I have both JL and REL in two systems. By far the REL disappears and the bass is seamless. That said, I have a 30x30 x9 ft room and 1 S12 greatly improved the sound paired with 802D's. I added second S812 as a stereo pair and it resulted in another level of improvement. I personally would either stack a second S812 or get the S212 given the size of your room. Hope that helps.
