Today the i5 is the nice place to be. The i7 in machines I've seen in the states are still a little too hot and rarely get more than 60 minutes on battery.
If you get a gamer laptop, count on repair or replace in 2 years. It may last longer but plan on that in advance as games take their toll in lifespan either by heat or keyboard pounding.
I need help deciding on which of these laptops I should buy. I'm going to college in a couple of weeks. I will be in the Information and Computer Science College at UCI. I wanted to be able to play COD Modern Warfare 2 occasionally, but i know that wont be possible with some of these laptops, but it's ok if there are other specs that make the laptop worth buying.