Based on your needs I would give a lot of consideration to a 4.2" or 5.5" Ruger Redhawk in 44 mag or 45 colt, or a Smith 29 variation in 44 mag for DA revolvers.
For a SA revolver look at the Ruger Super Blackhawk in 4 5/8" or 5.5". Also the Blackhawk in 45.