I have an old set of Altec 15's which I have replaced the 12" drivers, rebuilt the crossovers and repaired the horns on. they still sound good but I am thinking of replacing them with JBL L890's. What does everybody think? I listen to Rock ( Blue Oyster Cult, Dragonforce, Iron Maiden) as well as other less head banging stuff (Chase). I'm driving them with an HK 3475.