I'm using a Netgear Wireless b/g router (WGR614) on my home network. It does fine for basic things in my home office in my upstairs, but my PS3 downstairs does not get a good signal at all. Very slow with lots of lag, and I can't stream music very well and video is impossible. What do I need to improve the signal to the PS3? I'm perfectly fine with replacing my router, but I don't want to break the bank--maybe $100 or so, but preferably less.