Ok...here's the big thing, about any build people suggest on here will be very similiar but you need to put 2 things into consideration...
1.) are you a big pc gamer type person and if so
2.) do you want to get the best parts now or are you willing to wait and just get something good that'll hold you over for a few months until the new Directx 10 cards come out which will be better
here's what i'd suggest:
go w/ spartans build expect:
1.) pick out the case yourself. i mean cases matter cuz of quality but mostly cuz of looks and you might not like what somebody else picks out...also $175 is a LOT to pay for a case. about any $50 case is fine.
2.) get an E6600 instead of x6800...very similar processor except the x6800 is just under 20% faster for 3+ times more money and in most people's opinion not worth it...your money though. I'd say save $600 here and get the new Dx10 cards when they come out with that money.
3.) you also might want to look into a 2nd Hard drive (you could get another 250GB one for only $80 more)
4.) a 20.1" LCD screen is more than most people need but you could also look into getting a bigger one. if you do then make sure it's 8ms or lower. (Dells are nice but overpriced by the way)
Antec NeoPower 650W
Intel Core 2 Duo E8400 (w/ Arctic Freezer 7)
4GB DDR2-1000 G.Skill
Sapphire x1950 Pro 512mb (w/ V700)
250GB, 500GB and 1.5TB Seagate Barracudas (2.25TB total)
Fatal1ty XtremeGamer sound card *** generic TV tuner
Xclio 3060 case *** HannsG 22" monitor
XP Pro / Ubuntu 7.10 *** Razer Copperhead and Tarantula