I don't have a problem carrying around a 17-inch laptop, it would be used mostly for gaming in lan partys and such, so ease of set-up and power are major considerations for me. I have a shuttle SFF systems, and an LCD screen already. Which is not hard to trasport around, but set up with a laptop is just much easier.
Though I might decide to go with something more portable. And save getting the power laptop until next year.