'Best' cost/simplicity/performance 10 W Single Ended Class A

[npr]

After constructing two amplifiers ZEN V1 and appreciating its wonderful performance in sound terms. I questioned myself on the following step....
As the ZEN, the objective it is an efficient drawing. with conventional parts (easy to get) and the 'best' sound until the 10 watts...
In your opinion Aleph 3 it is a good following step or should i jump to ZV....9?

Thanks!

 

[Nelson Pass]

The aesthetic pleasure of milking performance out of a
single stage has not diminished with time. Toward that
end I think you would have fun with ZV9.

 

[npr]

Thanks! for the advice.
Next Step >>>>>>> ZV9