I think basing your purchase on the type of diving you are going to be doing is probably the place to start. There is no sense in getting a reg set with features you'll never need. IF you like Sherwood gear though, the Maximus is a decent dual purpose reg set. It is basically a combo between the Oasis and Blizzard. It might not be the most cutting edge of technology reg set, but it works reliably and to me that is what counts from ANY reg set. I have a Maximus and I find that the 360 degree swivel and under arm hose greatly reduce jaw fatigue on long dives.
As for the Sherwood SR-1... even though I love my Sherwood reg sets... I don't trust the SR-1 yet. In my mind, it hasn't paid it's dues and hasn't kept it's promises.( kinda like most politicians I know of...you know how much most people trust them...) As was stated previously, they have had some design issues. I don't like nor do I tolerate equipment with issues. I would recommend waiting a bit before jumping on the SR-1 bandwagon.
All the best and safe diving!
CW