Hey, Bill,
When I bought my first rifle (just last June, seems longer!), I ended up getting a CFX, because I was convinced a fixed barrle HAD to be more accurate. Well, I've shot a lot of pellets through several different rifles of both types, and I gotta tell ya, I don't think there's much if any difference. I've shot a Gamo S1 K and an RWS 350 that were just as accurate as my CFX. I think the shooter makes far more difference. I also think that being comfortable with whatever you shoot will have more impact on accuracy than anything else. I'm still working on that with my Beeman :-)! I do think that the fixed barrel guns will keep their initial accuracy, while the break barrels may degrade slightly due to simple wear and tear on pivots and locking mechanisms. So make you and your big fingers happy, Bill, and get an R9 :-)!
Dave