Theta Dreadnaught. Awesome response with the Magnepan 1.6 and easy to drive.
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If she can go a little more, check out this: http://www.audiogon.com/cgi-bin/cls.pl?ampstran&1274365705&/Spectron-Audio-Musician-III-mk
You can also call Galen Carol http://gcaudio.com/products/steals.html He's got a couple of demos.
It's an incredible amp.