If you listen to mostly jazz and classical, I honestly don't believe you will find a better speaker for that than the Summit, at least not anywhere near its price range. Yes, the imaging is superb but it goes way beyond that. With proper electronics and setup, the size and placement of the instruments is perfect, the tonality lends itself to a realism that is beyond any other speaker in its class, and the dynamics and transients are spot on. In other words, more than with any other speaker, a cymbal sounds like a cymbal; a bass note sounds like there is an acoustic bass guitar in your living room, and vocals . . . well . . . the right vocals are just spine tingling. B&W, KEF, etc. are great speakers. Don't get me wrong. They are enjoyable to listen to. But the difference is, with Logans you aren't listening to the speaker, you are just listening to the music. I know it sounds corny, but it is what it is.
As for home theater, there are many others on this board that already have multi-channel systems that can describe that better than me. I am only just now putting my multi-channel system together. Again though, think dynamics, details, clarity without grain, and with a Descent subwoofer or two, plenty of slam.