I currently have VTF 2 MK5. I've enjoyed it. I run 1 port open and keep the Q down for movies. I seal it with Q at lowest for music. I believe this gives me pretty tight response. I've enjoyed how low it can hit with one port open. I do about 50/50 HT/Music.

Due to some issues it is having though, I'm able to return it for free for a refund. It was always between this and LV12F and I have the "what if" itch. I originally went with the HSU because all of the customization appealed to me. In reality now, I think the only adjustments I'll ever do (for my current room) is opening/sealing a port between ht/music. I don't think I'll adjust the Q much at all because I think the lowest setting keeps it tight and still plenty of oomph.

Am I gaining much with the LV12F, or am I comparing items so close that there will not be much of a difference? I appreciate any insight as I feel stuck with the decision.