I just bought the Logitech MX3200 combo from Futureshop in their Boxing Week sale for $60.
The range is good and I am able to type and move the mouse with a wall in between about 10ft away.
Another way to deal with the issue is to extend your receiver to a better spot and USBs are fairly easy to hide.
Bluetooth would be the most ideal and Dell has a combo that goes on sale somewhat regularly.
Sharp D64u 42" & 46" , PS3 , Toshiba Qosmio G40, Yamaha 6130B, Energy Take Classic