When I was a post-doc at Stanford, I spent a month's stipend on a Model 18 that one of the grad students was able to buy at a discount because he also worked for a recording studio. I still have it, sitting on a shelf in our media room. It may have had only 40 watts per channel, but it drove any speakers I used with it to insane levels, including a pair of the notoriously inefficient AR3as. It's not used now, but it has great sentimental value to me; I wish I had a place to use it -- I still have the old AR3as in a closet as well. I highly recommend the 18.
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