Excellent appraisal Matt, and I concur with all said.

PGM should consider to make this a sticky.

The subject is raised often (I certainly investigated it in detail too before upgrading to Audiophile), and it would be a valuable resource to users exploring the benefits and differences between versions.
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BIAB & RB2021(Audiophile), SonarPlatinum, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M StudioMonitors, Pioneer Active Monitors, AKG K271 Studio H'phones