im thinking of WA5 as well.
originally i gave up on the idea of buying it since it uses double rectifiers and the idea of using 6sn7's, but many people are happy with it and Frank I holds it in really high regard, so i am considering trying it out, preferably a used one or hearing one at a meet. it would also work with HE-6 and be able to drive just about any headphone (in any specification according to Jack Wu lol....).
other considerations for me are the Glenn 300B amp (supposed to be about as good as 300B amps get) and the DNA Stratus 2A3.
I want to have a Glenn 300b beside a Stratus some day - it would be nice