o sorry bout that, i am so used to newegg, but it really depends. if you want a future proof very good video card, then 5770. if you want an older but still very very good video card, then 4870, and if you want nvidia, then 260. i have used the 4890, just a bit better than the 4870, and i was very pleased with it.
nothing really runs crysis on all high, but the 4870 runs it faster than both of the other 2, so yea. a 4850x2 or 4870x2 would also be good for you, if you are willing t ospend the xtra money. a 4890 also outperforms everything, for not much more money.