All,
All of the aforementioned holsters will give yeoman service. One of the best surprises for me (I'm kind of a holster snob) is the Don Hume H721 OT.
I have a Hume H721 for my 4-inch Model 58/28. You can hide these Dragoons under a sweater without much fanfare.
Hume is the working man's holster. Good gouge about Andrews leather. Good kit indeed.
They are big guns, but can be well hidden with the RIGHT OWB holster.
Remember: The best holster is NOTHING without the best belt. Get a good belt to keep it where it's supposed to be. Best $$$ I ever spent was on a Kramer, Rosen (Express Line from Dillon Precision) or even the nicer GALCO belts.
Good luck!