Just switched to a G5 mouse and Saitek Eclipse keyboard...luv them!
I got tired of having my microsoft bluetooth mouse and/or keyboard freeze up on me in the middle of a game and decided to go back to wired peripherals. I ended up buying the Logitech G5 and a Saitek Eclipse (not EclipseII) keyboard. I can highly recommend both of these. They are quite nice and seem to be a big improvement on my Microsoft Bluetooth mouse/keyboard. I liked the bluetooth stuff, it was comfortable and worked well, but every once in awhile it would lose the BT connection. To get it back I would have to remove the device from the BT config and then re-connect to it. Not a big deal unless you are right in the middle of a WoW PVP battle and get to watch someone obliterate you because you can't move..........2 or three of those was about all I could take, the Microsoft BT keyboard and mouse are now in my closet as spares 
Also, the blue backlight in the Saitek keyboard matches the blue fan led's in my antec 900 case.
2 x Xeon e5520 | Asus Z8NA-D6C
12 GB G.Skill DDR3 | Radeon 5850
Corsair 128GB SSD | WD Black 1TB HDD