The UFO and S5 series are both 5" coil subs, and of course not aimed at SQ. They both utilize a full carbon cone and cap with a kevlar vc former, so MMS isn't horrible. And they actually don't sound bad on normal music. Mine is a daily, and I listen to mostly 70's - 90's hard rock and metal, and it sounds good. The ST and Sv3 are 4" coils, and are great all around subs, I really liked the Sv3 subs when I ran them. The Tv3 and MT are 3" coils and are definitely more musical than the others.