I've been reading a lot about Magnepans and think that I've settled on a 5 speaker system. The issue then turns to what type of subwoofer I should use with them. I've been looking at SVS and their powered cylinders, and I think that they would work well. I was then reading about the wonders of IB subwoofers, and I thought "Hmm.. that might be kinda fun to do" If I were to build an IB subwoofer system, could I hide the drivers behind the mains (MG 1) and have the speakers cover them when not in use? Also, please give me links to good DIY instructions for IB construction, along with other good reading material. If I was to go the IB route, what brand of driver would you suggest? I was thinking about a single driver per enclosure, two total. Thanks in advance for your help!