Hmmm, counting only fully assembled, dive ready, compete reg sets (single tank diving):
(2) Apeks XTX 200s (yoke, although have DIN conversion kits on hand for them)
(1) Atomic M1 (DIN with Titanium yoke adapter/sealed)
(1) Atomic T2 (DIN with Titanium yoke adapter/sealed)
(2) Aqualung Titan LX (1-yoke/ 1 DIN with Titanium yoke adapter/enviro-sealed)
(1) Mares Ruby (yoke, upgraded to dry-sealed 1st-stage, tri-material HP 'seat')
(1) Mares MR16 Voltrex (DIN with yoke adapter)
(1) Poseidon Jetstream (DIN with yoke adapter)
Add for double tank diving:
(4) Poseidon Jetstreams (DIN with yoke adapter)
Add for ongoing 2011 reg projects:
(2) Aqualung Titan LX (presently yoke) in the middle of assembling all the components to build them up to complete reg sets (already have some MIFLEX, cold-water kits, DIN kits, one Apex Egress octo, some SS clips, Seacures, SPG's....still needing more SS clips/MIFLEX/ Atomic swivel hoses.)
....and I'm not going to bother counting my twin hose vintage regs, and some surplus Poseidon and Mares regs/components in storage or for sale.
My main focus for 2011 is no more regs (stop the madness!) but upgrading more existing units with more Atomic Cobalts.