I have Klipsch KG 3.2s front and back, and a KV 2 and 3 for centers. With 125 wpc Parasound amps, in a very large open room, -15 on the 950 is loud enough to render conversation impossible, even 2 feet away. The sound is, to me, incredible, both for HT and music.

The Klipsch speakers you list are far better (or, at least newer) than my 3.2s, so I think you would like the set up.