Posted 20 February 2011 - 11:09 AM
There are two real questions here. First is what wireless spec do your devices support. If they all support wireless N then replacing the router with a good dual band router will increase the speed between the router and the devices. If your devices support G only then replacing the router will not help in this regard.
The second concern would be your internet connection. Since even wireless G can handle more bandwidth than almost any residential connection this is probably your real bottleneck. Streaming video and audio takes a lot of bandwidth. With multiple devies accessing the internet at the same time this is a big drain on say a standard residential connection. I would do a speed test with no one else using the internet and see what your download speed is. Standard video consumes about 2.5 Mbps and HD content can be upwards of 10 Mbps. For instance my cable is about 20 Mbps (to a great connection on the other side) so having even 6 standard video signals would overload it. If that is your case then upping your bandwidth from your provider would be the first alternative I would choose.
Get your facts first, then you can distort them as you please.