cpu is fairly lowend now. Might want to look at cpu charts.
The memory is SLOWER then what the cpu uses (800mhz). There are intel cpus that do use 667mhz memory.
The motherboard is a little odd-ball, similar to my 520 nforce. M2N board will NOT support the newest amd cpus yet (like the 9850), my Asrock 520 just happens to. Careful how you choose and what board you do get. Less parts you have to exchange, the cheaper the next upgrade is.
As one said, the gpu is a bit slow. Again, look as various video card benchmark charts/reviews.
Take your time doing some research, nothing worse then getting a new computer that cannot play the game you want to play!
That processor is by no means low end, it's a kickass processor, the motherboard you should change to am2+ if you are gonna go amd, and the 8600gt's just suck get a 9600 gt, or 8800 gt or hell even a 9600 gso when they come out next week, and why no media card/floopy drive?hhhhhhMMMMMMM!