Adam,
Nice picks! I was curious about the F12's driven by tubes but you prove its very satisfying. Excellent! For a time I ran my F12's with a 35 wpc integrated to great results. Very sensitive speakers, the mark of a good design. I've had a number of dynaudio models over the years and, in comparison you need a massive beast of an amp to make the dyns sing. I recently upgraded to a brand new dna 125 and it's a wonderful match. I have some updates I want to post when I get time. Keep enjoying your music machine!