BioShock 2 is a DirectX 10 game built on the Unreal 2.5 Engine and it was by far the easiest game to benchmark due to the fact that it allows me to save and load my game at any time like EVERY PC GAME SHOULD! All the other games in this review rely on checkpoints in one form or another. I hate check point save systems so very very much.
Here are the settings I used in BioShock 2:
With AA and AS turned off the GTS 450 is just powerful enough to play BioShock 2 at 1680x1050 with or without 3D Vision.