I have an opportunity to purchase an Eico 2080 integrated in very good condition. I am not famaliar with this model or the classic series. I had an hf-89 amplifier before. I never had a piece of equipment with the 7591 tube in it. Is this going to be a mistake. My speakers are the Klipsh forte. They are very efficient but I like the extra power for the bass. I need a quiet amp.