My room size is 12' x 12' x 9' (W x D x H). I will use it for watching movies only and I like to feel the bass. The incremental cost to go from the 25-31 PCi to the 20-39 PCi is $250. Will the 25-31 PCi go below 25 Hz in a small room? Can someone who has experience with both models help me decide? The $250 difference is from import tax. If both models sound about the same, I would just get the 25-31 PCi. Many Thanks.