Besides you should know by now it's not the CPU that matters as much as the GPU. When you move past the i5 you lose (this is true today and may not be for lone) SWITCHABLE GRAPHICS.
I find many complain of heat if they don't get this.
1) AMD Phenom II Quad-Core Mobile Processor N950 (2.10GHz, 2MB Cache) vs 2.53 GHz Intel Core i5-460M
2) In general, i7 vs Phenom 2.
3) Whats the best AMD processor. I'm guessing i7 is the best Intel one.