Where would you be using it? Are you planning to take advantage of the battery life?
One thing about my MBP is that it ramps up when stressed. (iMovie for example and when I ran WoW once.) Mobility wise you're not going to be gaming it on it or doing anything that ramps it up unless plugged in and on a desk. (It gets hot.) Even then, 650 may be better but only benchmark wise.
Honestly, you'd be better off with a 13" MBA (w/ 8 GBs). Are you a student? (Go for the student discount.)
1400 USD (1340 student) MBA w/ i5 5000 HD GPU w/ 8GB 13" + Apple Care 250 USD (183.00 student) + what ever Apps you'll need and 12 Hours of battery life (10 real world most likely.)
Versus 2200 + 349 for the 15" Entry Model plus whatever else you'll need to go with it.
I love my MBP as my personal and work machine (work is buying me a MBP 15" for strictly work) and see no reason to get rid of it or upgrade now even though its been retired to just a personal machine.
There is more to love in an MacBook/OSX than gaming. If gaming is a deciding factor, you're not going to get far as that is still a work in progress. My MBP 13 w/ 3000 Intel HD GPU runs Trine and Trine 2 beautifully as well as Plants vs Zombies.
My new 4770K w/ 4600 HD Graphics plays WoW at fair settings (the 4770K was a want, I just built an SFF gaming machine.) I can try to benchmark EVE for you if you want. The HD 5000 GPU on the MBA's should run those better.