I am in the market for a sub-$200 video card to put into a machine I'm using, and I've come to a crossroad. For the same price I can pick up either a geforce 7900/7950, or an 8600gts. While I am certainly interested in the 8 series' newer features and technologies, I can't help but think about the 128 bit memory bus that the 8600 sports vs. the 256 bit bus that the 7900 series has. Also, I have read that DX10 is not impressing everyone with its features. So, while I was initially focused on the 8600gts, I'm now having second thoughts - would it be wise to go with a 7900 or 7950 instead? I'm talking about real world performance here.