What are you looking to test for?
There aren't too many realistic benchmarks for games besides actual games themselves. Unreal Tournament, Quake3, various benchmarks for each platform. Other benchmarks are highly dependent on system configuration and also what is running in the background. They are useful for determining if tweaks worked and how well they worked (like Sandra and 3D Mark 2000), but most synthetic benchmarks mean nothing when compared to systems that aren't almost exactly the same.