I am in the process of moving my HTPC to a rack in my office with cables running to our living room. I need to run a 15-20m USB extension and am not completely sure the best way to do it. I have seen 20m powered extension cables, but have seen reports that these do not work that well, dropping down to USB 1.1 speeds or just not working. The other option is a USB to Cat5 adapter. Does anyone have experience using one of these. I have seen a few but the specs state they support 10/100BaseT which seems to indicate that they couldn't support USB 2.0 speeds.
I plan to use a hub at the TV end, connecting an IR receiver, XBox 360 wireless adapter, wireless keyboard adapter and a webcam.
Any advice would be appreciated.