I have a price range... of around up to $2500 (for a pair). Not a lot, but should be good enough for some great sound. I have the M3, PSB Alphas, a pair of Energy bookshelves, old Bose 301s (Yeah, I know), and old Sound Dynamics CS-3s (fronts, bi-pole surrounds, center for my theatre). I want them to be a stereo pair to listen to... just music. When I'm chillin' out with a drink. Always been under the impression that the sound is different without a sub. Currently I have a Velodyne 8" that kicks out some decent bass, but may not be as musical as other subs (I mainly only use it for movies).