Called Panamax today since they didn't return my e-mail. Sending me a 4300. Your right 2 Channel the 5100 is the proper match. They wanted $150 dollars for that unit, which is 50 points of list. Not much of a deal, probally covers their cost and still gives them profit. Also the new unit only comes with a 3 year warranty. I always wondered whose lifetime a lifetime warranty covered, mine, the products or companies. They told me they entered my return wrong that is way it took so long. Didn't want to talk about how I felt I was being downgraded. Any suggestion on how to make my amps have delayed turn on/ off since this unit does not do this. My Adcom 5500 and 5503 make too much thump if they turn on with the pre-amp. I know I should have gotten the 5100 but I'm stubborn and it was the principle. Also don't suggest munster!