That is exactly what i'm looking for! I was going to go ported because I heard alot of good reviews of ported boxes sounding great in our large cabins but if sealed is the way to go for quality then i'm all in!
I was looking at a JL 10W3 or an IDQ 10 D4 subwoofer enclosure, if you think sealed is best then i'm down with that. That box you linked is perfect, doesn't extend under both seats.
Edit:
You mentioned the 10w3 doesn't fit, how does the TW3 sound?