What settings give the best SQ and the least “adjusted” sound in 1.3 please?
‘Least adjusted’ does not necessarily mean ‘best SQ’.
For least adjusted: turn off DSP Engine entirely and turn off volume levelling at zone level. You’ll have the most direct audio path, which is basically the same as in 1.2.
There’s no objective scale for ‘best SQ’ AFAIK. If you find one, please let me know. 
For me it’s the SQ I like best.
It might seem obvious to some, but it was a long and expensive journey for me.