I should say that I've got a budget of around $500 for this.
The iBuyPower Gamer power 528 is looking pretty good to me at the moment with these components: Athlon II x 4 620 and the ATI Radeon HD 4670.
I thought I'd put this to the wisdom of this forum. Is this a good combo for gaming?
The X4 620 will be too much for the HD4670. The best deciding factor for a CPU/GPU combo is your monitor size and its resolution. What do you have?