Holy cow do you have money to spend
Want a best friend??
I'd go with the AMD system, but instead of a FX-51, I'd get hte much faster FX-53, it's less than the EE and out performs it in gaming
You also might want to look at Corsair or OCZ RAM, instead of GEiL unless GEiL sells registered sets for less
Also maybe look at the next generation of video cards like the 6800 Ultra rather than the 9800XT.... If that breaks your budget than get the FX-51 and see if you can fit the 6800Ultra in then because in gaming the video card makes the difference