The NHT 2.5i (tower) goes low (mfg. rating around 29 Hz). So what subwoofer do you match it with to get HT punch AND music integration? The 2.5i handles music just fine (it makes TV sound tracks come alive also) even at the low end (has an 8" ported woofer). Looking for a sub that also has the same kindof clean bass with more SPL for HT. Anyone dealt with this problem?