After arguing with myself I guess it would have to be a 4" M58 S&W .41 magnum because it's been with me the longest and will do it all.
I initially thought a 4" .357, or a 7.5" Supr Blkhwk or P220, but given all the shooting I've done, the most enjoyable has been with the 58. Finer balance than the adjustable sighted ones in my opinion, and rides about as nice as a 4" .357. There you have it. The Bianchi 5BHL would be with it.
Best-MC