I am looking at the 17" model and was wondering if anyone know what the performance different is will the i5 and i7. The most intense things I will be doing on my computer will be playing some game (L4D2, Startcraft 2, Diablo 3), game development with the Unity Game Engine, and some low ploy 3d modeling with Cheetah 3D. Is the i7 going to get me a major boost in performance or is it just a few tick better?