Brotherbob (Rick) has GIK Tri Traps and is planing on adding reflection treatments at some point. He has a thread somewhere, and if you look at my superchunks thread, he has commented on how just by adding tri trap, things have improved in overall sound. Glenn and Bryan from GIK are also great people and will help you. They are always on AVSforum, Musicplayer's EthanWiner forum, and others. In regards to graphs, the main goal is to tame the peaks/nulls to within about a 10dB variance, which does make a big difference.
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