If you're going to build a new computer you might be interested in checking out the new system guide over at ARS Technica. They have compiled three systems for you: a Budget Box, the Hot Rod and the God Box.
Choice appears to be the hallmark of this edition of the System Guide. Both the Budget Box and Hot Rod have excellent choices from Intel and AMD available in the CPU and motherboard selection, running the gamut from low- to high-end. Combine this with continued jumps in video card performance from both NVIDIA and AMD, and we end up with lots of choice in both the Budget Box and Hot Rod.