Help with Laptop selection

I'm in the market for a new laptop. Priorities are:

1) Light and mobile. 4lbs or under preferably.
2) Long battery life. Would love 3+ hours if I'm just surfing web.
3) Fair gaming performance. Don't need my games maxed out, but need to be able to play them.

Price limit is $2,500 US.


Suggestions on particular models or even websites where to post are welcome.

Ended up getting a 4.1 lbs Sony Vaio:

http://reviews.cnet.com/Sony_VAIO_SZ...-32044391.html

So far so good. Great battery life, doesn't heat up too terribly, and the graphics card has met my needs. Slim and light to boot.