I'm not replacing, but just planning to purchase the "C" along with the RM 30M's... I see in another post that you're installing it horizontally. I have a space limitation (height) that prevents me fom using the LRC and am curious to how the RM 30 will work horizontally. I previously was thinking the 626R, and stuffing the rear port (I'll be placing this in a cabinet under a future 42" Plasma). The 30 will fit my set up even better than a 626 would (I know it's got to be tilted up a bit).
Did you ever get an answer from Brian on how this would work horizontally?
John