Harbeth SHL5, Spendor 9s, Vandersteen 5As, Devore Orangutans, or best of all, used Tannoy Prestige series.
That said, if you're going to shell out $4k to $8k for speakers, I hope you'll be upgrading what you have upstream, in particular that DAC and Apple TV... which are likely the key culprit for any harshness in the upper frequencies you're hearing. The Bryston amp is likewise doing little to mitigate things if that's an issue you're trying to resolve.