First, you absolutely need to remember that EVERY regulator builds moisture inside it from the saliva in your breath. Most generally it collects at the bottom of the regulator and is vented out upon exhale, although this may not be true for every model that exists.
I have had great experience with my Mares Axis (bought as a student/first rig) and my Zeagle Envoy (upgraded to this). The only issue I noticed with the Zeagle is that like any equipment you dive with it should be serviced prior to cold water diving if you have used it all season. Mine was a bit tempermental in 45-55 degree water temps after diving all summer and fall.