i have a Suunto Favor, Stinger, D4 and Mares Nemo Excel. No problems on the Suunto as it is a good computer, but recently my D4 giving problems (about 80 dives) as it will auto reset the time during a dive. Am sending back to Suunto Finland soon. Few of my buddies have D6 and 3 had problems with the depth / time during diving. (the dive com continue diving up to depths of 110m, even after diving).
Mares is pretty good as well, but on conservative side, similar to suunto. The thing abt nemo which i like is the metalic base (as compared to D4) and its quite good looking.
Am getting a Uwatec Galileo Terra soon, so i m selling off the Mares Nemo if anyone interested.