If you have one revolver, it should be a 686, preferably the 7 shot "+" version, with a 4" barrel. It fills the hand, but the pull is short enough nearly anyone can shoot it DA. At 4", the full-lugged barrel has the perfect balance for target or defensive use. It is rugged enough that you won't wear it out shooting. Enjoy!
Bianchi holsters are okay while you wait for delivery of something better. Unfortunately their leather is thin, the initial fit is extremely tight, but gets floppy with use. The belt loops doesn't hold the gun close, and is too loose for a smooth draw without dragging the holster with the gun.
For an OWB, I want a holster that fits tightly, and the right (15 deg) angle, has enough retention (without snap) to hold the gun upside down, but smooth enough for a quick, quiet draw. Anything by Alessi, Ryan Grizzle and a dozen others is worth the wait (3-4 months) and moderate extra cost.
4" is little long for IWB, but okay if you don't mind a mild poke in the butt when you sit down. There is nothing I would consider besides a Sparks VM2 for that job.