Go with the gateway.

A lot of the HP/Compaq notebooks have really crappy wireless cards. I think the last I read was something like 1 out of 6 made are having to be sent back to HP for new motherboards and wireless cards. I've sent mine in twice and still have the same problem. I gave up and bought a USB network adapter. Their customer service is very weak. I'm not sure about the one in your link, but I've been very unhappy with my HP. I don't trust them at all.