ok. heres the situation my old sub died and i need a new one. i was looking at the SVS and from what I hear its an excellent sub. however i don't kow which one is right for my room since i can't test it out. My room is 15'x14' i was thinking about the 25-31 pci because its within my budget and looking at some SPL test result it seems like a great sub. What do you guys think? Should I go with the 20-39pci istead? Is the 25-31 a perfect fit to my room (as best as one can tell)? Thanks for the help William C.