I don't know what your budget is but I would definitely look at Shindo. They make some of the best SET amps. Another amp I would recommend is a VAC 30/30. I know its not a SET. It uses 2 300b's per channel. I have one myself and don't see how you can go wrong with it.
I need a SET amp to match my Dude Pre.
I have 98db Daedalus Ulysses speaks. I just recently took delivery of a Dude preamp. I want a SET amp that the Dude can shine through. The SET will have to have the ability to stage, resolve and have freq ext just like my world class pre. But MOST important I need a emotional and musical connection. I feel the Dude is a destination pre and I need a SET amp that can also carry that designation. 16 watts and up seems about right as my friend brought over his Melody AN211 (integrated). It was sublime and actually made me smile. Now I am searching for that sound quality with the staging abilities of the Dude