sounds good. The thing is you have heard all the amps so therefor how about this; What would you choose that would be interesting for you to realise that provides minimum 20 watts; triode PP with tube rec and as far as power supply choke input with B+ as high as is required to obtain that big sound such as you describe with the 813's? And whatever sounds personally intriqueing. I think you can get some dedicated experimenters here now that Guinevere turned out so well. As little feedback; or even variable feedback as possible. Set a reasonable limit of say 800$ in parts. Construct it in sections that can be individually tested before moving on to the next section. E-Linear with seperate DC filament supplies. Start with the PS maybe; whatever seems best. Draw up a common top-plate template that can act as a reference for other projects but provide some uniformity between samples. Group buy whatever parts we can. Just a thought, J.R.