A word of advice.
I purchased the wireless keyboard at first, thinking that it would be nice to rid myself of some clutter on my desk.
What I didn't realize was that the wireless keyboard is much smaller than the wired--there is no numerical keypad on the right hand side and is way too small to be comfortable typing on it. (It's the exact same as the MacBook keyboard, I believe)
I would suggest going with the wired version, which is a full keyboard...it's a low profile, but I like it.
It's sort of a personal preference.