For a C&V bike? I asked a similar question two years ago, ended up putting a wireless Cat-eye, of course the least expensive, on my Raleigh Gran Sport. I like knowing mileage, and occasionally knowing speed. The only downside to wireless is that it is subject to interference occasionally, not so that it affects distance but that it affect maximum speed. I've registered up near 200mph once or twice. But since I really don't care about that it doesn't bother me. The extra processing required for wireless means that the inexpensive models don't compute average speed, but that not terribly important either. The bike just looks nicer without all the wires. I'm thinking I may move that unit over to the Masi though.