Nice bike! Buddy at work has one of those and rides the heck out it.
For a computer, we've got 4 Cateyes Stradas on the bikes in our garage in various flavors (wired, wireless, cadence...). They're easy to set up, small, are pretty cheap, and work great.
We installed one of the Bontragers that CraigB recommended on Mrs. Zoxe's Raleigh ... it is great too and a little easier to read.