The 9nt's are a little reserved, so a somewhat forward sounding amp like a Bryston 4B-ST balances them out & makes for a good marriage between the two. The Classe C-200/201 works well too, yet was too warm sounding combination for my ears. The British 9's really dig Canadian electronics. Yet figure on atleast 200-250 watts to move them via Solid State, & 60 wpc via Tubes.
Good Luck!
Good Luck!