Don’t overthink or obsess.
Set up and connect the system. Stable support for the electronics. Do some reading about the Forte IV and take your time to decide the positioning for best sound. Enjoy your favorite music. Hopefully, it sounds great to you and you are all set.
If, after spending some time with the system you want a change, then different speakers would probably make the most difference. Fortunately, the Pass allows you to use speakers with a fairly wide range of efficiencies.
you have the ability to try less .