Hi dubwicht,
I've built all of Shannon's amps including an ST-35, three eiclones and one ST-70 clone. They all have Triode's Dynaclone transformers in them and they all sound really, really good. Lately, I've been driving my Dynaco A-25 speakers with my ST-35 and I can tell you that amp has plenty of bass and is just wonderful to listen to. The board is easy to build but you'll need to punch holes in some kind of chassis to get it put together.
Triode's transformers are very nice indeed and are of very high quality. They have Teflon insulated leads instead of the older cloth type insulated leads. But the sound is what's important and I mentioned above that they sound great.
Not sure what else I can offer but to say that I don't think you would be disappointed in the ST-35 at all. It is a great amplifier. There are lots of pictures on the site to show you how various folks have built their versions. Some are extremely fine looking. Mine isn't since it was built on a plain aluminum chassis with no fancy woodwork but that doesn't affect the sound.
Good luck with the project! I know you'll enjoy it. I'm sure others here will say the same thing. Oh, and I think somewhere here Shannon has posted some frequency/distortion response data. I also seem to remember that Uncle Ned (Triode Electronics) has some response data for his transformers on his Web site. Needless to say, I'm very happy with the results I'm getting. BTW - no association with either.
With regards,