It would help to know what you are trying to do with the amp and your budget. For a budget audiophile like myself, McIntosh and Krell, even used are way out of my price range. I do know that the good old Adcom GFA-555II is rated at 325 watts at 4 ohms x2 and can handle a two ohm load. And at $350 -$400 for a used one is an affordable one.
