i havent had my type R's for a while now...couple months or so.
they were in a TCAB box...ran off a 2500d @ .5 ohms
yes...they were loud...SQ wasnt that great. and they just didnt have a smooth overall sound.they sometimes struggled with the lows
now this could be due to the box, but i have heard them in different setups and as a consensus i feel that the W7 is just a superior woofer.
now i have my single W7, its extremely smooth and drops extremely low. its incredibly accurate, and has excellent upperend extension.
but...since you said you want a SPL setup more than an SQ setup, the 2 - 12'' Type R's will be right up your alley.
mine were @ a 147.4 off 500 a piece...get enough power and the right box and they go wild.