I spent weeks checking out specs online. I used a Scubapro MK20 with a 550 for dive class and it was fine. I didn't have much else to compare it against. The LDS was willing to sell me a new MK17 with a used class regulator, but even then it was not cheap. The class regs may have been fine inside (and recently serviced), but were scuffed up big time. I was also leery of buying 2 year old class equipment.
When it came down to it, I could get a lot more for less, and get new equipment with a warrantee if I went with a different brand. So today I ordered a Zeagle DS V from Scubatoys, plus the DS V Octo. Sealed for cold-water use, good support, etc.
I also was in the market for a basic computer- They had an Aeris XR-2 that they gave me a deal on. Nitrox, back-light, PC downloadable, alarms, etc. Looks to be a nice little computer.
A lot of the tech. divers use the Suunto Vyper I understand- About $100 more than the XR-2 though, and I did not see any features on it that I had to have.
Buying regulators local is a very good idea, but I can't afford to pay list price. So every year I'll have to mail back my regs to Scubatoys to do the maintenance on. But since I live way out of town, it's faster to put stuff in a box and ship it than to drive down town. The money I saved on Regs and hoses, paid for the computer.
Zeph