The exact same reason im building amps in the first place: Its fun!
I like transformers in the output section of amps. They make the amps safe and easy to build. Dc offset is no big problem.No loudspeaker protection needed and they seem to sound very good. Se Susan Parkers Zeus!
Any and all litterature about tube-amps is good. Some candy at www.tubecad.com.Any suggested reading (beyond Susan's thread) would be appreciated.