My vote for keyboard and mouse combo would go to the Logitech UltraX Media Desktop. Low profile, quiet laptop keys and 5 button mouse. Batteries last for ages and the range isn't too bad either. Very pleased with mine for the few months I've had it. However, considering your budget is a bit higher, I'd be inclined to look at the MX3000 (never used it myself, so not sure of performance - but a friend has one and it seems very nice)
As for the remotes, it depends what you want to do with it. The creative remotes (I have the one that comes with the Audigy 2 Platinum) are good for working with their own software, but require line of sight being IR and are limited to media playback.
Best remote I have ever used has to be ATi's Remote Wonder. Its RF so works without line of sight, and has much longer range. Can control loads of programs by default - even more through customisation via software. Best of all, allows full control of the mouse/cursor
Another option - if you have a compatible bluetooth phone and bluetooth dongle for your PC, have a look at a piece of software called Salling Clicker. Allows control of the mouse, and media players including iTunes, winamp, media player etc. And with it being controlled by your phone, you have a small display on your "remote" showing whats playing etc.
Hope that helps
