I dont' think you can ever play crysis at maxed out quality even if you willing to dig out $2000.
http://www.tomshardware.com/charts/g...v1.21,757.html
a CF 4870 x2 or GTX280 will only give you 20fps at 1600 x 1050. I think you can go up to 1900 x 1200 which will make the fps even worse. (These are for parts 6 months ago, not sure how much things have improved during these 6 months)
Btw, Crysis at 1600 x 1050 + maxout quality on PC will have much better graphic than on console.