I use a laptop now, its much easier for when you're on the move, have projects at school, and if you feel like laying down on your bed and playing instead of in a sweaty chair in front of your desk all day
The current laptop I use was much better then my old desktop anyway, 17" screen, very decent specs for a very affordable price and manufacturer. You just need to look at deals on laptops, and usually you will always find a great one.
The only problems you might encounter are overheating, even for a gaming laptop. It's nothing to serious if you manage your cooling system well.