I’m looking for an sleek integrated amp under $15k

Depends on what you mean by sleek. And how musical do you want to get?  You’ve got a nice budget. If sleek means a special old school look, unparalleled craft, stunning musicality, and flexibility because of optional DAC and phono cards, look no further than Accuphase. If sleek means more modern, simple box, Naim will do the job better than most. In between as someone else suggested, Boulder. 

Heaven 11 Billie mk2

I have the RS520 and I love it. Using the 520 DAC to resolve CD’s from an Audiolab 6000CDT. Also running The Classic by Project turntable via a MoFi Studio phono preamp to line in. It’s a fun system that easily drives a pair of Focal Vestia N4 augmented by a pair of SVS SB3000’s.

Thanks everyone. Almost certainly getting the RS520.  It hits all or most of my requirements. 

@fastfreight   said (12/15/2023)

Maybe you are just baiting us with that price and then wanting features but not even mentioning musical quality

Yep.