While I use an EgoBrain 10 on my road bike, I have a Cateye Cordless 2 on my city bike, and has served me well for almost two years.
I do prefer cordless - much less to get in the way and go wrong. I wish Campa would come out with one.
But I would highly recommend a computer that showed you cadence - the most important function in my opinion.
Cheers...Gary