I finally got the last pair (Paradigm Monitor 9 v.4 not shielded) of speakers for my HT, good timing since we are moving in about 4 weeks to our final home until we retire in about 30 years. My other speakers consist of Monitor 9 v.3 (shielded) , CC-370 v.3, and Velodyne CHT 12. My question is what are the difference between the v.3 and v.4 (regarding the Monitor 9s) and will I be able to tell the difference? I curious, even though I plan to use the 9v.4 as the mains and the 9v.3 as the surround. Any comments or feedback is welcome. Thanks in advance and the speakers are being powered by a Rotel RMB 1075 AMP (with a Rotel RSP 1066 Processor, these from what I recall are the correct models but I could be wrong).