I would not say they are the best as there are several good mfg out there. It all depends on your desires. I have owned several and like what they do for me (easy to read, easy menu navigation, easy to adjust). The conservativeness is a red herring in my book. It may be so but if know how to manage your dive profile it will rarely if ever be a problem. Now about the only dig I will say about Suunto is that several have built in compasses. They are worthless IMHO. . Get a Suunto Sk-7 analog compass they really are one of the best. The new "2" versions which have the built in compass also have a matrix display which I do not like. Also I do not like that for some computers (Gekko, Cobra, Vyper??) when in nitrox mode they default back to 21% when not used for 24 hours (or something like that).
Look at the Gekko which does both air/nitrox, no downloading (though this can be got around), or the Vyper which also has a gauge mode. The Cobra is the same as the Vyper but also has air integration but still on a console.