Its hard to have a vehicle that does well in SQ and SPL... so what?
The man is ready for the challenge...
The SPL part of it is not in this thread. Taking a bunch of "good sq" woofers and slapping them into a wall doesn't mean they will maintain SQ, or get loud. What will be used for SPL is just that, whatever will get LOUD. The subs can be turned *off* if need be, and a single 8 can be in there for SQ, which IMO would probably be a good idea, if the SPL setup wasn't up to par in SQ.