I beleive the PSU is most important because a cheap one can burn your hole rig up don't skimp on it. 2nd you can find a refurbished 4890 GPU with a lifetime warranty that play games excellent for about 159.00 .3rd skimp on your case and go small on your HD you can add another 1 later in RAID.You can actually buy a powerfull system if you find some combo's with free shipping .I bought my PC mainly from TIGER Direct because theres no tax here in cali. Enjoy shopping ! check your MVL always.
I built mine for under a grand a year ago .
Q9400 2.67 @3.2 GHZ__ Arctic Freezer pro 7__ P5Q pro turbo__Gskill 4GB DDr2 @1066__ 750W Pc power & cooling__ XFX 4890 @900/1000__WD640GB cav blk__ Lian-Li K7B__Acer 23"H233H__ XP 32