I've owned my fair share of speakers including the Lsi 15's. Just took delivery of my M80 v2's today. To my ear, these things simply outshine anythig I've owned to date and far surpasses the Lsi 15's. I actualy experienced a cabinet resonance issue with my Lsi's right where the crossover was connected to cabinet. Wasn't isolated. By the way, my M80's are bi-wired via my Arcam AVR 300, which i being fed by an Arcam FMJ DV29 DVD player.