And the winner is ...for me.
Harbeth for the Naims. I think I can confirm the consensus in the HUG (Harbeth Users Group) that Harbeths are best paired with SS amps. I don't like them with the Primaluna.
ProAc for the Primaluna Prologue2 with Mullards & Gold Lion KT88s. Just I think the right combination.
Sorry, I'm not that good with adjectives.