I've been using Pacific Cable cables because they are significantly less expensive than Monster, and I've had good luck with them.

One thing I've noticed with DVI is that HD cable box makers are still getting the hang of DVI - my Pace box's DVI output is if anything slightly less crisp than the component output, and I've read notes on AVS forums that seem to have similar results with other brands. In theory, DVI should be a superior format, and eventually I think it will be, but they may still be getting the kinks worked out.