All I was going to say was that you should get DDR RAM, but Blade Runner already said so.
So I'll say some more...
Make sure you get a case you like, and if since you're getting an AMD make sure to get many many fans. Also make sure you get a quality power supply, as those can often lead to problems down the road. I know Tom's Hardware had an article that recommended two or three brands for power supplies, Antec being the only one I remember.
The only other thing I may recommend is researching quite about about all the parts you pick and try to make sure they are all compatible. Something you may overlook is the RAM, which I don't know too much about how the quality varies from brand to brand, but buying from a namebrand such as Samsung may be worth it just so you know it works and is compatible.
More importantly I think is choosing the right motherboard that's compatible with everything. You might want to look at the parts of an Alienware AMD computer and see what motherboard they use, because they seem to make very quality computers.
Well, buzz buzz... I've said enough.
db