Poseidon regulators

[tbone1004]

If you're in for doubles, the Apeks Tec3 and XTX50 sets are nice, love mine.
Also love my Poseidons, but parts are a pain... Have never had a DST freeze up on me even in water in the 3-4* celcius range. Did have a MK25 freeze on me, but that was in a high stress environment when I was kicking against a current in no vis... I don't even want to know what my SAC was then...
The Xtreme's are great regs though, still prefer my Jetstreams though... The Xtremes breathe more like normal regs though...

The other finicky thing with Jetstreams that was mentioned here is the fluttering at shallow depths. This can be eliminated with breathing techniques, but is still a learning curve...

 

[wrekster]

I used Cyclones for many years and loved them. I switched to Aqualung Legand XL's about 6 years ago becuase of the maintenance cost and service issues. I like the Legands, they breath great at depth and in cold water but I do miss the Posidons. If you have access to parts and a good dive shop that uses and supports them I would go with the Cyclones.