i would go for TX or HX series corsair, and a HIS HD4850...
a 4850 runs everything perfectly on that resolution...spending 10k more on a 4870 wouldn't be wise, 'cause the difference will be clear on only some "high graphic" games...crysis and other games are thirsty for money...even if you put in a GTX280, it wont max out...hence, people SLi or xfire cards...so, other than these games, even a 4850 would be sweet enough...save the money and spend it on the PSU or maybe even
save it for a change of pace...
-peace
stickman!