I'm looking into getting an Fi Q 15" subwoofer. I want a great SQ sub so I figured this was the way to go, but now I have a dilemma. I'm not sure if I should get the high QTS or not, I know I'm probably going to put it in a sealed enclosure, but I'm worried, if that isn't right for me. If I change my mind in the future and decide to go ported, is the high qts going to be a problem? Thanks.