Rick,
I am in a similar situation only mine is created by my wife. We are building a house that has a 20 X 20 great room with one opening into another room...our ceiling, though, is vaulted from 11 to approximately 20 feet (two story house).
I currently have a 20-39 PC+ but she does not want the "big black tube" in her new house...she wants something that looks like an end table in Cherrywood. Cool, I thought...A way to upgrade...
I wrote to SVS and had Ron reply with the replacement suggestion being a PB12-Plus/2 as he said it would it would serve my purpose as I have grown accustomed to the power that it provides in the 13 X 18 room with 8 - 10 foot vaulted ceiling...not to mention, it is one of the two SVS boxes that come in the Cherrywood finish
...will match closely with my Warm Cherrywood Axioms.
So I am in a similar situation and am "planning" on "upgrading" to a PB12-Plus/2 in Cherry. With Ron's blessing to the decision, I don't think either of us will go wrong.
Hope this helps.
Live from Austin, Texas.
WhatFurrer