ill tell ya what i just spent for my new pc just so you can see the difference (i rounded the prices up )and this was 2 weeks ago.
asus a7n8x-e deluxe 100.00
2 x 256 ddr 90.00
amd 2500+ Mb 81.00
hs/fan 19.00
9600pro 109.00
52x32x52 cdrw 39.00
80 gig wd 7200 hd 70.00
case w/ 400watt 25.00 (i used this for my old pc and put this one in my old case w/the 430 antec ps in it )
= 533.00 plus tax
i reused my monitor , floppy ,labtec speakers,kb,mouse, and win 98se (270.00 investment here) and i think i paid 75 for my antec ps .
so im around 880+ tax 950 total or so .
(i sold my water cooled pc for 1200 w/ a 21 in monitor so i came out ahead , i just have to finish my new water sytem and sacrifce anouther old 286-486 pc for its ps and case to hold the pump/radiator/resevoir tank)
your getting that ati 9800 pro card so ull spend more . but yes thats a very good card and you should be able to load the textures in video memory and still run nice frame rates .
im getting 65-80 fps with my 9600pro and i havent seen it go below 30 fps even in the biggest furballs
so your not really too far off my total mark for a nice gaming PC and something that you shouldnt have to upgrade for the next 3-4 years (even though there's all that new 64bit stuff comming out, the current 32bit 2.0 ghz and bigger are gonna be the standard for at least that long in my opinion)