I have the Microsoft Desktop Elite Wireless set and love them.
They run off of AAs for an absurdly long time. Seriously. 2 AAs in the mouse and it lasts for 6 months. I don't have to charge the sucker every night. It just works, and a window pops up when it's time to replace it.
Optical, tilt wheel, two side buttons.
PLUS the scroll wheel is click-less. It takes a bit to get used to, but when you do, you appreciate it.
And the keyboard has a scroll wheel on it, too. http://www.microsoft.com/hardware/mouseandkeyboard/productdetails.aspx?pid=016
Plus the wrist rest on the keyboard is a nice soft pleather.
lol! You're kidding right?! I'm using that exact same POS only because it was the only one I could find lying around. I hate this thing. It has no wait and feels flimsy.