Specification Dilemma XPS vs Macbook Pro

To make a long story short:

I currently own a Dell XPS M1710. I've owned it for about a month and don't use it at all. I use my Desktop more than anything for my gaming. So I was thinking of selling my M1710 to buy a Macbook Pro CD2. Not to long ago I did own the MacBook Pro CD and ended up returning it because of how hot it ran. Also I found out that the ATI X1600 video card was underclocked which didn't make me too happy. So here are some concerns before I put my M1710 for sale.

1. Has the heat issue been resolved with the Core 2 Duo?
2. Does Apple still have the ATI video card underclocked?
3. How does World of Warcraft play in OSX and bootcamp?
4. Are there any new models due out anytime soon?

I mainly use my laptops for internet, email, photoshop, and gaming mainly only WOW.

New: Dell XPS 1710 Core 2 Duo 2ghz, 2gig Ram, 100gig 7200RPM, Nvidia 7950 GTX 512, fully loaded

Returned: Alienware Area-51 2.16ghz Core Duo, 2gig Ram, 7200RPM 100gig HDD, Nvidia 7600 256. (System Randomly Shutting Off)