I owned the RF-7II's for about 6 years. Just off loaded them.
While I enjoyed them and agree and trust Mark's reviews, I personally wouldn't go for the RF-7III's knowing what I know now. Actually, I had just started getting into the hobby right as I purchased the RF-7II's. If I could have done it all over, I would have simply built
my own speakers. Regardless, here are a few pros & cons I can think of off the top of my head regarding the Klipsch:
1. Can run full range with solid output in the low 30's.
2. Bulletproof. Seriously get louder that you would think they could full range.
1. I really can't imagine a huge improvement over the RF-7II model. You can usually find them used for under $1,500 a pair.
2. Published sensitivity *most likely* is inflated. The RF-7II cut-sheet specs the sensitivity @ 101db, but they have been measured here
on AVS to spec @96db. Not a huge deal, but misleading none the less.
3. They can sound a bit harsh if you are the type to push them to their limits.
4. If you have ample woofage you will most likely cross these @ 80Hz per THX standard (as most do). Thus no need for the low end extension.
I mean, it really comes down to your goals and listening habits. Since you are more of a classical guy it sounds like your listening habits would lend to the RF-7III's being perfectly ample to cover the entire frequency range of your music. For movies, it's my opinion that you would need more extension...at least down to 20Hz or so. You would be surprised at how much content you would be missing while watching movies if you only had the RF-7III's running full range. I can say that (again my opinion) I have heard subjectively better high sensitivity speakers that objectively measured better. That said, the further I have dug into this hobby over the years, the more I have found that EVERYONE is different and has different tastes in what they like.
I would bet 100% that if you picked up the RF-&III's you would be completely happy...if...you never visited another theater with an equally capable setup.
Of course, if you were willing to build, you could have a pair of 1899's
that would obliterate anything remotely close to it's price range in every measurable way for ~$2K.