My Scubaflow

mk25 and s600 give me the nicest breathe still. I now have a set for single cylinder use, and a second set on the twinset. With the R380 as a second regulator on both sets, and for stages/pony setups.
I have access to various club regs (Apex, Aqualung, & Scubapro )in my garage and the s600 is the best by far.
Not exactly the cheapest option.......