I had an opportunity recently to hear the RF-7s on a full McIntosh setup which included the MC402 amp. I must say, that at their $2k price tag you would be hard pressed to find anything comparable new (they are out classed by most Heritage Klipsch speakers, which you can find used). After I listened to those, I auditioned a pair of B&W 802 Nautilus speakers on the same McIntosh setup. Simply amazing and only bettered by several Wilson/Krell setups I have heard in the past. Hearing the RF-7s by themselves they sounded great, but when comparing them to the B&Ws afterwards I realized, by comparison at least, the RF-7s were shrilly and hollow with muddy bass response. It took a speaker four times their price for me to realize this and I think that speaks well for Klipsch as they have built a great speaker for the money. Klipsch builds amazing mid-level speakers. Between my father and I, we have owned various Klipsch models since the 70s and still have all of them. Before you start spending the big bux, the Klipsch brand is hard to beat.
One other thing. Anyone running any of the higher level Klipsch series on any kind of Receiver is doing them a tremendous disservice. You really need to run them on seperates.