I'd get the 12" (in fact I did
). I used to use my old 8" sub at night placed over a towel on top of the 12". That didn't bother the neighbors at all. Then I used them together for a while.
Now I use 2 12" subs all the time level matched to my system. Late at night when bass heavy scenes come on, I just temporaryily turn down the system volume til the explosion or whatever ends, usually only a few seconds, then turn it right back up. It's become a habit to have my finger on the volume button on the remote late at night. It's less overall work than constantly adjusting the subs volume and doesn't really ruin most movies. it's a bit more trouble with something like u-571, so I tend to stay away from late night viewing of those types of movies.
Also, a few weeks of asking my neighbors if they had heard my sub the night before let me know how loud I can get away with without waking them up or being annoying.
Jack
