Hi guys, i been subjected to absolute BS from dealers with regards to subwoofers and what is *best*.Funny, this THX dealer told me that the 5000thx [email protected] I'm thinking of building an IB from Stryke av15 drivers, as i've heard they are the best bang for the buck. Two manafold arrays each with 4 av15's.Its just so damn cost effective to build an IB, and I think 250 watts per driver is optimum, what do you think? What kind of displacement am i looking at? 18 litres VD.The only problem......okay it could be a HUGE problem, is a tin roof(attic).And does parts express ship internationally, as i'm from South Africa?Is there a way to counter the *tin roof* problem, or am i done for? Please, some needed advice.