hi Jim,
im looking for the same keyboard and mouse! although i need mine to pass through walls, as my PC is upstairs and i want to play games on the TV downstairs.
Ill share my finidings so far..
http://www.wireless-computing.com/products/bundles.php#
these US keyboards look expensive, but the RF receiver looks big (not the usual USB dongle) so i'm tempted to belive their claims on range.
I have also thought about the other end of the price spectrum. If you buy a 2.4Ghz mouse and keyboard you can modify the ariel on both the devices and on the cheep usb receiver by following these, or similar to these, posts.
http://hackedgadgets.com/2006/11/10/wireless-keyboard-range-boost-hack/
http://hackedgadgets.com/2007/01/04/improve-cheap-rf-mouse-range/
However i have not tried these things, and wouldnt want to judge your technical ability in these areas, but for most i assume this is worth a try, may be fun, and will void warrantees.
please let me know how you get on or your progress so far!
cheers