I just got an Oxycheq second stage because it's compact and adjustable (as well as stylish) to use as a second with a Zeagle DSV (also great bang fot the buck). It's only $80.00. I hooked it up to a sixty dollar balanced first stage from 123scuba.com (on this board) and it breathed great. So, I'm suggesting that anyone looking for an exellent regulator for $140.00 consider that combination. Great for students.