For a PP amp, this is the general set of design specs( in no particular order):
good sound
availability of parts
inexpensive, plentiful tubes
sane B+ ( less than 400V, likely ~300 )
accessable design( no ridiculous tricks required )
ease of troubleshooting
few parts
10-20 Watts ( with samll variation, 30 )
Class A bias of power stage
1-man, single channel portability

For a general idea: 807's @ 280V/80 mA into 10k with 40% U-L screen taps. E-Linear connected 6BK7B phase splitter front end.

For a bit more power, EL34 into 5k-6k6....or KT88/6550's at 350v/110 mA.

Again, soooo many opinions as to what is the 'best' way and so many means of doing a very similar thing. It all depends on taste and a few basic requirements. What do you want? is one which ought to get answered first.
regards,
Douglas