Vintage British Mullards in a BHSE are definitely a good way to slightly "tame" the old 009 without sacrificing too much detail. I'm not sold on the R2R superiority thing though - I ended up with a little ECP Audio DAC (Wolfson chip, not R2R) that I found to be slightly smother and more analog sounding than my Yggy. Again, without sacrificing too much detail. But of course none of this sounds as analog as vinyl.
I've never had an issue with the 009's forwardness (no issues with Focal Utopia either), and I've long advocated the 009's superiority over 007 Mk I, so it'll be curious to see how I react to 009S. I'm stoked that you guys have killed my expectations before I finally get settled at home late tonight for a listen. Nothing worse that getting expectations way too high before a movie and then not enjoying it!