Anyhow, with 150 dives under your belt and clearly you really enjoy it, it makes sense for you to get a regulator you can trust and have fun diving with. I would not hesitate to buy used if you want to save some money. Regulators have not significantly improved in many years, just lots of new features and gimmicks.
And I found a very nice gently used (under 25 total dives) balanced reg..Hollis 500se with DC7 1st. DIN, I know, but I have the yoke conversion kit being sent as well. Cannot wait to work it out and have my "own" equipment from fin to mask. Thanks for your insight. If this works as advertised I may be buying some more gear for my wife who is still feeling out the whole dive experience.