Not a super techie guy. I'm looking to have wireless access to a tv and computer on the main level, and computer, tv and xbox on the downstairs, where the router would be. I need suggestions for a wireless device to accomplish this. Some people say get the dual band, some say the 2.4gig is fine. Used to stream movies, play games online without lag etc. Nothing over $200 would be preferred, but I could go more if it is worth it. Thanks!