I think for a revolver, single action is the way to go. You won't use double action in the field most likely. For the best, Freedom Arms, but you'd be more than suited with one of the Ruger SA's. I prefer the .45 Colt or .41 magnum but the .44 is more than adequate.
Another type to consider are the single shots. Thompson Center, Competitor, MOA, HS Precision, EA Brown, plenty of choices here. With these you can get a lot wider choice for chamberings.