Mid-Range Gaming

I'd like to spend $1,500 or less
Looking for 15.6" or less

I am looking for it to be usable in a business setting and also to play World of Warcraft on medium/medium high.

I'm not too concerned with screen resolution and/or battery life.

I have this computer in consideration:
Envy 14, i5-560, 4gb ram, ATI 5650

Will this work, should I look at anything esle?

Thanks!