HP.com has huge $400 off $999 desktops coupon via code DT3948. Their loaded, high-end HP Pavilion Elite m9400z Desktop starts at $749.99 (the coupon code removes the $150 instant rebate to $599.99) so add $250 in upgrades, enter the coupon code and you'll still pay just $599.99. I'd add the 2.3GHz AMD Phenom quad-core processor ($80), select the free upgrade to 4GB of memory, add the 512mb video card ($70), select the free upgrade to a 750gb hard drive and add the Creative Soundblaster Titanium Audio ($50). This also comes with a 16x Lightscribe DVD / CD burner, memory card reader, and Vista Home Premium. It doesn't come with a monitor, so check our LCD Monitor Deals.