I'm planning on getting the Macook Pro, 15", 2.4 Ghz, with 4 gigs of ram, and
this monitor. I plan on this being my main computer for the next 2-3 years. I've had Macs all my life, and I, personally, love them to death.
WoW will run a lot better on the Pro, but this really comes down to how much computing power you need and for what. What kind of photography do you like? Are you listening to music, or composing it?