i am looking for a box for my ext. cab silverado to go under the back seat. i really like the outward firing boxes, but the biggest sub that will fit in them are 10s. i can fit 12's in a downfiring box, but i kinda like to see the subs. are 12's that much better than 10's? if so, what are the differences? i was looking at mb quart premium series if i could get them to fit. if not, then probably the reference series.