Velodyne Optimum 10 large enough?

Have a 15x20/25'(extra 5' starts halfway across back wall) basement with slab floor and 7ft drop ceiling. Will this sub be large enough for HT/music?
I would go with the 12. I have a 10 in my girlfriend's system and it is very good but the room is smaller. The 12 also goes a little deeper.