If thats your definition of a good system you are gay
AMD=POS
4 gig ram = going to be out done in the next few months
512 gfx,= Either get an ATI card for your AMD or else dont get a graphics card AMD+ati or Intel+Nvidia and why not just get the new 700+ cards out 768 i think with the Nvidia 8800 GTX
300 gig harddrive= weak go for a 1TB or more
Do what you want with the fag drive
Good Luck making it work, since it sounds like you've never built a computer, you know what i said above is more like going all out, make your own, its going to save you assloads of money