Best MTB computer?

Just wondering if any one can recommend a decent bike computer that can handle rugged conditions. Extra features such as Cadence (RPM) & Altitude would be great, without the expense of buying a Garmin Cycling GPS. What is better, Wired or Wireless?

I originally had a Cat Eye Enduro 2 (CC-ED200), however the "heavy duty" cable snapped from the bracket after I went over the handle bars on Red Hill. I replaced this with a cheap & cheerful Aldi wired cycling computer, which flew off the handle bars during the Dirt Works Classic, losing "precious" racing time much to my annoyance. On a local ride it came off again for no good reason, then got flattened by a truck, before I could retrieve it from the road, I couldn't believe it.