Room is 3000 cubic feet, and I'll be pairing these up with two RF 62 ii, RC 52, RS 42.
I like music and HT both very much, and don't want to sacrifice one for the other.
My thoughts, I would want two 10s for full volume in my large room, but the 15 would give me that super deep bass at and below 20hz. I think it'd fill up the room, but still not sure which way to go. If I could tame the 15 I think I'd be happier with it, but I'm still torn. Old school thoughts are that a 10" cone is the best for music and blah blah... Not sure if that's true today, if it ever was, but I don't want to discount it.