Jude, that's a nice preliminary list but with some glaring holes in it, eg. akg, beyer, denon, dna, eddie current, etymotic, grado, head direct, headroom, schiit, shure, sony, stax, ultrasone and of course beats & bose , just to mention a few. and what about ttvj and moon audio? are any/many of these likely to show? i'm sure the free brewskis will boost attendance!