After read through hundreds of messages, comments, reviews on the web, I visited the HSU showroom in Anaheim yesterday. Unfortunately, Dr Hsu wasnt there. The other young poor man tried to help me. Even thought he did everthing to help me, but when I threw bunch of questions at him, he didnt seem to know much regarding the subject !! Back to the equipments, the show room was modest at best...didnt even setup properly. I was planning to buy the stf-2 as raved by every body here....so I had him A\\B audition test between the stf2 and vtf2. The guy just janked the cable from one sub to another...didnt really do any adjustment....The vtf2 sound awesome to me, just like how I expected it to be. However, I was shocked at the stf2 performance: it was no where tight, powerful, or musical like the vtf2 and all the raved on the net!! Even after I play around with the adjustments, the sound is still weak, boomy...quite disappointed. My Sony sub (5.1 set, first generation, made in japan) sound much tighter, more musical. I refuse to believe myself..and convince that it wasnt setup properly. Im still in the process of looking to buy this sub. Some body please give me a reason why hthis sub will be better my sony, and why I should buy this sub? is it actually significantly better? would the differencec be noticable?