I have the CDM-Cse and it's a great center. I would like to upgrade to the CDM-NT for a new HT room that will be used primarily for cinema. Considering the CDM-NT center and CDM1 bookshelf differ in bass extension (50Hz vs 60Hz) and sensitivity(91dB vs 88dB), I am thinking to use 3 center versions across the front (as long as they fit!). I found the CDMse center to be a bit better with producing vocals and overall having an improved tonal balance over the CDM1 in the past. I haven't really done much listening with the new CDM1-NT but considering the specs are very similar to the old SE series I suspect not much has changed. So the big question is: Is there anything specifically bad with using the center for Left/Right mains? Of course I'd love to get the CDM9's (and must resist the temptation!) but I don't think 2X the price of a pair of CDM-CNT is justified primarily for cinema use.