Yuki the Third
Well, my room is on the other side of a wall or two, and I was wondering if there's a router with decent enough power to get some good speed through it.
Brick, concrete, coated glass (like mirrors or UV-treated exterior windows), and wood are the biggest trouble in RF propagation. Make sure that the wall between you and the router isn't made of anything other than wood and drywall. (Knock on it a few times: If it sounds hollow and soft, it's probably just drywall. If it sounds hard, it may be plaster. If it makes no sound at all, there may be concrete.) Any metals - especially a mesh, like found in plaster or concrete walls - will block or reflect any signals. Copper pipes will cause signals to bounce around, but you might be able to find a "hot" spot. Concrete and coated glass will block most of the signal - about 10-20dB.
Yuki the Third
Or, will 5 ghz N work better?
5GHz signals are an order of magnitude less efficient at passing through solid objects, and have about half the practical range, to boot. If you're having trouble at 2.4GHz, 5GHz will probably be worse, since at 5GHz, any of the attenuation effects you see from materials in the wall will have almost 5 times the effect.