CPU - hot! and I mean the temperature. The 90nm fab process makes for a hot, power-hungry chip. L2 cache is small for my taste.
Motherboard - I have never heard of ASRock, but all of the specifications seem reasonable.
GPU - integrated graphics are notoriously slower than a PCI-E x16 graphics adapter. Shared memory means stolen from the OS.
Memory - Corsair is a good name. CL5 seems a little high to me for middle speed DDR2.
Monitor - not my area. I did not see the refresh rate, but it will need to be fast (low ms number) for gaming
HDD - I've heard good buzz about the Samsung Spinpoints, but never had one myself. Love the 32MB cache!
Case - Antec is a good name, but this Titan is odd. Only one exhaust fan? I'm not sure that is enough cooling.
DVD-RW - Pioneer is a good name, SATA good, you can't hardly go wrong with this.
CPU Cooler - there was none! How will you cool that 90nm Athlon64 X2? I don't like the idea of a stock cooler and a case with only one fan.

Good for games? Some. The CPU is quite powerful, but the GPU will always be the bottleneck being integrated and having no dedicated VRAM. Add a PCI-E x16 graphics card and the gaming performance will come up. Yes, and the price too.

Haydosrulz, well you have changed the game now, not that I mind. The Intel Core2 architecture is powerful, competitively priced and, with a 45nm fab process, runs cool and uses less power.

* CPU -- good clock speed, 45nm -- this will be *much* cooler than the Athlon
* Motherboard -- this is a step up with even better specs than the previous one. Note that the second PCI-E slot is x4, not x16.
* GPU -- wow! This is really a step up. The Radeon HD 4850 is a very powerful GPU and with 1 GB of it's own memory, it won't slow you down. Good for gaming.
* Memory -- Kingston is also a good name, maybe CL5 is good and I'm just out of touch.
* HDD -- WD Caviar I have experience with. They are noisy and no speed demons. A Seagate Barracuda is no faster, but makes less noise. The Samsung Spinpoint may have been a better choice, but I still don't have first-hand experience with Samsungs.
* DVD-RW -- still can't go wrong with a name brand drive.
* CPU Cooler -- the Intel retail CPUs come with a stock cooler that is good enough, if you are not overclocking. Also, since we are talking about cooling a 45nm CPU, heat is no longer a concern as it was with the Athlon.
* Case -- I'm still not liking the Titan. One thing that I noticed is it says "server" case, whatever that means. Take a look at the Antec three, nine, and twelve hundred. The Nine Hundred would be ideal for this build having plenty of cooling, but not too much. Of course, it doesn't come with a built-in power supply.

You don't need an audio card because that motherboard comes with a Realtek HD Audio chip that can handle up to 7.1 channels of sound.

if i can afford the 1200 antec case over the 900 should i get it

btw im thinking about this power supply http://www.skycomp.com.au/product.aspx?id=30279

The Antec Twelve Hundred is a bit of overkill for the system as it is now. However, if you should ever add a second graphics adapter or more hard drives, you might need more cooling. So, I would say that getting the Antec Twelve Hundred would be future-proofing and that's your call.

Oops! There is a problem that I didn't notice before. You have a DDR3 motherboard but DDR2 DIMMs. These will not mix. You either need a DDR2 motherboard and keep the DIMMs you have or go to DDR3 memory DIMMs. DDR3 is faster, but has higher latency and is more expensive. You don't need DDR3 and using high speed, low latency DDR2 will give you excellent performance and save some money.

Asus is a well respected name in motherboards and a personal favorite of mine. That board does have and audio chip, where it says:
"ADI® AD2000B 8-channel High Definition Audio CODEC". You want a motherboard with High Definition Audio or HD Audio which is a current industry specification.

haha how many mistakes can i make?

I decided that i will get the upgrade for ram not mobo so http://www.skycomp.com.au/product.aspx?id=107208

Will get the antec 1200 for 'future proofing'

thx for the help with the sound area

Wow i cant believe that u can make such a big problem by just buying a power supply (lol) i think (and hope) that this'll do http://www.skycomp.com.au/product.aspx?id=92127

thx again

It's better to make mistakes here while asking for feedback, than to get all those parts and find they don't work together. That new PSU that you have linked to still has a 120mm fan mounted on top/bottom -- not good. Also, the efficiency rating says "up to 85%", but you want one that is a minimum 80% or higher. There is a certification for this called 80plus which has a little logo, a rounded square with big "80" in it. Here's an example of the same brand from the same store with the 80+ cert. and the 80mm rear exhaust fan at the back:
http://www.skycomp.com.au/product.aspx?id=42401

The DVD drive that you have picked out is a writer. The category it is under is "CD/DVD burners" and the description says "Super Multi DVD Writer". A DVD writer will also burn CDs.

Haydosrulz, sorry, but I made a mistake too. Those power supplies with the 120mm fan on top (or bottom) do indeed exhaust out the back. Those 120mm fans are *intakes* that draw in case air and force it out through the back of the PSU. My bad, I was confused and I hope I didn't confuse you too much. The Earthwatts 650 looks like a fine choice.

I see your latest DVD writer is a little cheaper, but I did like the features of the Pioneer with the quiet operation and anti-dust mechanism. Of course, it's your build and your choice.

32bit Vista and 64bit Vista are two different operating systems. You have to buy the one or the other. It is NOT an installation option. When you go to a website or a store, it should definitely say what it is. Note that not all programs that run on 32bit will also have 64bit versions. This is a little inconvenience with the 64bit system.

@whs
Actually, they are the same OS. One is just 32-bit and the other is 64-bit. Otherwise, completely identical in every way, shape and form.

wat is the diff between oem and retail?