Sonys faber Amati G5

Very nice speakers!  I can say what doesn't work, the Mac MA12000 integrated was clipping driving Amatis.

You really need to share what sound characteristics you’re looking for and are most important to you, otherwise you’re just gonna get suggestions of what other people like that may or may not coincide with your tastes/goals.  Also, are you looking for an integrated amp and are you looking for new or used?

My friend is driving his SF Amati with Burmester 911

and Burmester Pre (I forgot which model exactly) but it sounds quite divine.