I had a cateye strada wired that worked well until the wire pulled loose from the device. Then it proved almost impossible to fix. I had a Sigma wireless device that was usually fine except when it lost the signal from interference - this is sometimes, but not always, owing to riding near someone else who has a wireless device, so its less of a problem if you tend to ride alone. Now, I've got a Garmin Edge GPS, which is just great, but 5X your target price.

Bottom line - if you don't want to spend the money for something very expensive, then wired or wireless are both ok but imperfect. The Cateyes and Sigmas both were mostly satisfactory.