My current sub (Creative S-750) works pretty good but, I have noticed some new movies with good sound tend to overtax it causing this flubbing sound. King Kong sounds very good at high levels. the floor and walls will vibrate. But! The newest Batman movie causes the bass to flubb bad! Is this because better sound on the DVD? In both cases the track was Dolby Digital EX. Any advice on a Sub that can handle the newest, latest and greatest? Including DTS MA and DD True HD? So? Down firing, active, passive radiator, multiple smaller cones vs. large, wattage, asymetrical cases vs. 'square',... I listened to a HT setup using the Infinity Cascade Model 15 sub. This one has 4 6'' drivers. Really sounded good playing Journey to the center of the Earth and Pirates of the Carribean at high levels. Anything on this? Mainly I want to stay away from that flubbing distortion. I listened to a sealed sub that was $800 bucks and it flubbed bad playing Indiana Jones at BestBuy. Thanks in advance. Jeff.