You probably don't need a regulator this good but if you really insist on the very best, here it is.
Description:
The Seaira Titanium combines the latest technology and materials to create
a super lightweight regulator with incredible breathability. In Sept/Oct.
’98 Rodale’s recognized the Osprey/Airtec as “Best Reg’s
for 1999” and it performed “Beyond the Limits” with the
greatest stability at depth. IDI again goes “beyond the limits”
by finding more ways to make breathing more efficient. Combined with the
brass heat exchanger, the titanium tube and adjustable orifice gives you
unsurpassed performance. In fact, the Seaira is engineered to deliver
the most air at all diving depths. And with just two simple turns of the
ergonomic flow control knob, you can quickly de-tune or fine-tune your
regulator. Seaira Titanium regulator second stage with Titanium Airtec
first stage, titanium tube and orifice, brass heat exchanger, stainless
steel lever, clip and spring. Nitrox-ready. Suggested retail: $1300.00
Results:
Inhale Pressure = 12.86 mbar
Inhale Pos Pressure =4.91
Exhale Pressure = 10.11 mbar
Ext Work Of Breathing = 0.72 J/I
Inhale Work = 0.22
Pos Inhale Work = 0.10
Exhale Work = 0.65
Interstage Pressure = 9.9 bar.g
HP Supply Pressure = 100 bar.g
Tidal Volume = 2.50 litre
Breath Rate = 25.24 bpm
Ventilation Rate = 62.4 lpm
Tank Pressure = 1500 psi
Depth Of: 60.9 msw (200 fsw)