I don't know your financial situation but if a) you are wealthy through yourself, parents or whatever, AND you have great investments for a long happy life, then buy what you want and spend $10K on a supercomputer. b) you saved the cash just for a computer to play Crysis on high settings, well, you probably need to readjust and rethink some things.
I don't know much about Crysis but why don't you just contact the creators and the engineers who designed the game and find out exactly what the requirements are to play the game in high settings? I'm guessing it will take less than $10K. Perhaps the game maker did this on purpose to use as a chase the carrot kind of trick. Perhaps there is something they know that can be tweaked. I don't know if people have tried this already so I'm just throwing out ideas.
Personally, b/c I am not wealthy but could afford to spend $10K on a system, I'm building a $2,500 machine and leaving the rest in my retirement, savings and other investment accounts.
Good luck.