[WoodenKnight]

My impression is that if you're looking for SQ, sealed is a better choice, especially if you have the amp to drive the sub since it gives a far better reproduction (or am I reading the frequency response charts all wrong?).

The bit about what parts moves how much should have little bearing in normal circumstances because in ICE setups you will not be driving the subs hard for most of their lives. So the argument of if it moves too much the less its life does not hold much water. In my plebian thinking, my poor little mind argues that any system needs to move the same to produce the same volume/quality for the same frequency; it's just different how good it is from recovering from the previous frequency played at a certain volume to play the next (response time?) and obviously with the freedom that vented enclosures provide, a sub will find it easier to do that and stress the amp just a bit less than what would happen in sealed enclosures. But lbm, in your setup (or as high-quality ones) -- you should not be worried about all that -- just worry about the SQ and that's what sealed will give you (unless of course all you want is more of SPL).