Matt,
I agree that Pachmeyrs on an FA 83 are a crime. I've shot both micarta and laminated wood gripped 454's, and liked both grips. As far as holsters, Bianchi makes a chest holster that is really nice. I've dunked guns carried on the hip in snow and water, so prefer to pack the guns higher. I'm using an underarm holster on my 480, but am thinking about getting a bianchi.
If you can make it out to Rabbit Creek at lunchtime for a shooting session, stop on by.