After a bit of pondering after my last post, I've got two designs in mind. I'd prefer not to spend the $250 on a pair of ST-70 output transformers. I'd like to keep the output transformers under 200. I'm trying to decide between building an "ST-70" with Edcor transformers (probably have to be a 5k or 6.6K) or building this design, also with Edcor transformers: http://diyaudioprojects.com/Schematics/Mullard-EL34-Push-Pull-Dynaco-A420-Tube-Amp-Schematic.htm Alternatively, I could scrap the EL34/6L6 idea, buy a pair of ST-35 transformers and build a 6BQ5 amp. I'd really prefer the extra power of the EL34, but I'd be open to that idea if it would sound significantly better. My speakers are 87db efficiency if I remember, so I think a 17W amp would be pretty small. Unrelated, anyone know the power transformer or B+ voltages in a Conrad Johnson PV10? Thanks guys, I'm still a little new to this. Sorry if this post is a bit redundant to my last thread.