They should sound great. I'm driving a pair of C1 Signatures with and Octave V70se tube integrated. Great match for the money. I even tried tried an Octave V40se with the C1's and that was is also a great match. Tubes in my opinion have a great synergy with any and all Dyns. The only SS that I've heard that to me is better is the Burmester 911 MKIII's. Sounds like Pass may be in the same league as the Burmester but I've never heard Pass Labs. There could be other that I've never heard.
