Just out of curiosity, why the fascination with going to a 12in? I run a 12in but given your room size etc, I'm not sure you will get that big a change. If anything look at getting a better 10in. The SVS PB-10-ISD would work fine for you and is under $600.00. If your hooked on going with a 12in however, that same model comes in a 12in version for $599.00.