I'm a fan of Dell. I know many are not, and probably rightfully so, but my newest (and current) computer came from Dell.
About every 4-6 weeks, Dell runs a special for [about] $400 off on orders for a [Vostro or Optiplex or Insperion] costing more than [last time it was] $1,099.
Before buying a Dell, be sure to check out www.gotapex.com. Right now, from the GotApex page, they are showing a coupon code for $300 off an Insperion costing $999 or more. Also do a Google search for "Dell Discount Coupons". My Dell is now five weeks old and they haven't run the $400 "deal" yet, so I'm guessing that one will show up in the next ten days or so. I paid $795 for a Vostro with a Q6600 processor, four gigs of RAM and a 160 primary and 80 secondary hard drive and overnight shipping. I placed the order on a Monday at 4:00 Dell time and it was at my door on Wednesday morning.
And I made a mistake (besides not getting big enough hard drives) - I should have ordered my computer with one gig of RAM (saving $220) and ordered four gigs from New Egg for around $100. But I would post everything here at How-To Geek to make sure I was getting the correct memory.
And - it is very common to get a better price from Dell by calling. I forgot to this time, but it worked very well a couple of years back. Be sure you've configured your system exactly before calling.
And - for some strange reason, over the past few weeks the Dell site has been extremely slow in Firefox, but working correctly in IE.