Windows 7: Laptop for diablo 3.

Hey everyone,
my friend is talking about buying a new laptop. He just uses it for the typical things, music, internet videos, pretty much what any typical user does.

He asked me to take a look for him too, he gave a price range of about 800$.
Figure this is an easy to do task, but then he mentioned he wanted to get diablo 3 (who doesn't).

So now I am taking a look at what laptop to recommend for for what he wants to do. We live in canada, and I assume he wants to buy it in store (not online).
The main stores to use are
Memory Express, Inc. - Computer Parts & Laptop Computers in Canada
Future Shop - Future Shop
Best Buy Canada - Best Buy Canada

If someone could make some recommendations on what to get, what to look for to fit the needs and so on that would be great.

(sorry if this post is not in the right area)

He would be better off buying a desktop for gaming then a laptop. Can get a gaming desktop for cheaper then a gaming laptop which are like double the price with lower specs.