So I am about to start commuting to school on monday. It's 25 miles each way. I would really like to be able to track my speed and distance traveled and stuff. Get an idea of what I am actually doing and how I progress throughout the semester.

Current speed
Average speed
Odometer
Trip distance

Those are the only things I really care to track. Other functions are just a bonus or whatever. I would like it to be wireless, but working on a pretty cheap budget so not a disqualifying factor if it's not wireless. It does need to be waterproof as I will be riding in the rain. It would also be nice if it mounted read-ably on my stem since all my handlebar space is used to hold on.

I am looking at the Knog Nerd cause it's wireless, cheap for wireless at only $45 shipped, and doesn't look lame (yes I would like it if it didn't look lame, call me lame for that if you want). Still reading reviews on it though.

Any other suggestions?

Edit: I also need to be able to remove and install the face easily since I will be locking up at school for hours on end. Dont' wan't i tto get stolen.