In my opinion you should just wait for the X6 instead of buying the X4 and then the X6. This way you can save some money if you can wait a bit longer.
Try getting a AMD 555 and unlock the cores? If not, teh 555 is only 1-2 fps behind the i7 for gaming iirc.
Edited by Domino - 5/15/10 at 6:41pm