Hi Roxy and the others with real answers, thanks. My post about forums going off topic was not you, it was about a B riley who wanted to blab about his views on how to shop. I am facing the decision to buy a replacement for my beloved Aloia 15.01 that is a pure class A. I had to sell it a few years ago. Now should I go for another class A, or are the new D amps as good, and cost less to buy and less heat and lower utility bill. I don't play music loud. thanks to all