Hiya I would like to eventually get into a full face mask. I have an Atomic B2 that I love so I was wondering if I should start with an OTS Spectra or would I be better off going with a OTS Guardian or an Ocean Reef Space Extender or Neptune 3? I do like how you can adjust the breathing on the Ocean Reefs but I wanted some other people's thoughts on them. My wife and I dive together and we're interested in having communications systems. How is the breathing effort on these masks? Also what is their service interval like? Any advice would be greatly appreciated and thank you very much.