Hammerhead, the Model 27 is 3.5" and the Model 19 is 2.5". The other one the Model 586 is of course a 4". The profile of the 27 and 19 are similar. I think they both are pretty menacing.
Here are my 6" & 4" Mod 19's. They both are a pure joy to shoot! I prefer the 4" & shoot it the most. Both are smoooooooooth as silk & in SA, the trigger pulls are like snapping off an icicle! I don't own a bunch of wheel guns, but I won't argue with someone who says the 19 is close to perfection.
I shoot a lot of .38 spcl in cast, plated & jacketed.