I'm using this one and it's great. But the surface is very slippery, it's not like with older MS mice that had a grainy feel. Mine is actually not that slippery any more as I've used this for months and it has worn a bit. (sanding the sides is one option if you are in to long gaming sessions, in normal use it doesn't matter).
Although you don't need to lift this mouse, as it's way faster than your old one,you will still try to first and get frustrated of the slipperiness but you'll get used to it.
Side buttons are also more forward than any other mice. I like them, as you can't accidentally press them ever, but again you need the used to the placement.
The laser engine is absolutely solid. It won't skip ever and it's very precise. I would how ever recommend that you hack the usb.sys to 500hz to make it even better (google will help with it) and get some mouse skates on bottom. edit: seems you are in Vista too, 500hz thingy is harder to do than in XP. Used it i XP but left it be in Vista.
You'll also love the cord. It's very thin and feels closest you can get to a cordless mouse, as doesn't pull. Also the accelerated scrolling option is awesome in drivers and precision booster is useful if your into photo shopping.
Oh and this is smaller than your previous one and a bit narrower in the middle. If you are a palm gamer it might be too small, I use fingers so it's fine.
Pointer speed in the middle + enhance pointer precision is what I use in desktop and its under mouse width from side to side in 1024pixels. Have fun, it's a big improvement from 400dpi optical, came from it too