I also had the K 50s, having demonstrated the K 100s too, but thought the 50s just sounded far more "fun", the K 100s were too "clear" in the treble for me. The K 50s replaced Wilson Benesh Arcs and worked brilliant on the end of a SN2 amp. But then I also just wanted a bit more bass and took a punt on a pair of Shahinian Compasses. Can't see me changing anytime soon!Prior to PMC's I had Red 50's. Brilliant wee speaker that I only changed in the search for more bass - I did not get on with subs despite trying several. Can highly recommend the brand - Russell Kaufman personally answered e-mail queries around set up. Price appears to have risen substantially - just like everything else I suppose.