CJ-62 Nice approach. But there is no easy way to address this issue (which is the best Regulator). This is way too subjective. Why? I have seen ScubaPro Mk-2 R190's perform poorly. Not due to the equipment, but due to how it was tuned. The dive service detuned the reg, reacting to the divers who did not know how to use the in-water/out of water control. Shame, That day, my 20 year old Mk5, with a R109 outperformed a 3 year old Mk2/R190. The MK2/R190 Reg was setup hard to breath to avoid free-flows on the surface. I have friends that refuse to look at Mares as they saw one free flow once. Then again, I will not buy Mares due to their decision to not manufacture Dacor parts. IMHO, If they ignore one brand or models, they will ignore others in the future.
I gave up on persuing this topic on this site. Too many attacks. People get too passionate about their thoughts and/or decisions.
My advise would be find out more about the LDS' in your area, which regs can you get serviced and how much to service. I use three shops as each services different equipment. The ScubaPro Mk5, R190 costs roughly $80-$100 to service. The Apex Tx50, Sherwood Magnum, Dacor 950's costs roughly $50 to service ( I have four rigs and one pony setup). Also, find out how good the annual service is. I have taken my Dacors to three shops over the years before I found the shop that tunes it well. Unfortunate how servicing and cleaning effects performance. I have used Rodales to help my research. I have overlooked a lot of good regs. If you pick a major brand that tested well, I doubt you will go wrong.
I love my Dacor 950's. Although I can still get them serviced, parts are an issue and switched to Alex TX50. The ScubaPro Mk5/R109 works nearly as good. I rarely dive below 100 ft. One buddy has Atomic B1. Loves it, dives very dry, easy breather. Needs less maint than the ScubaPro's. Other buddy had one to many issues with Scubapro (different LDS than mine), uses Oceanic and loves them. Other buddy has Sherwood, never failed but is not pleased with it. Four people, none of our equipment matches.
Happy Reseaching - Tom