I have been playing them on and off for years and they are really great for sessions. Marshall/Orange is kind of like peanut butter and jelly. They just work together perfectly. Clients also friggin love'em. I've owned and/or have used most of them and I have had the best consistent results for the RV50.
Good amp! Not really tight tones without a clean OD, but definitely unique. Pretty forgiving too. It was the first (and only) 6V6 amp I've ever owned. Your demo sure sounded exactly like I remember mine!
I think the amp is super tight, we just split the signal with my Marshall Friedman mod and tried to record them together and it didn't really work to well cause the RV was so much quicker and stopped so much quicker. The client flipped out this morning when he played it for the first time. Made to the amp wall: