Alex, I agree with Zak. Most manufacturers have free parts replacement plans, Aeris included.
Even so don't you want to clean the salt off, have the internal parts visually checked for damage or unusual wear, tune the reg, etc? Or are you just wanting more options as to who and how your regulator is worked on?
As for top regs I always have liked getting my hands on every reg I can. By the time I figure out what I like best I have my eyes on something new, lol. I guess regs are my favorite piece of dive equipment.