Best Integrated for Martin Logan ESL 13A

I am looking for some suggestions for an integrated (or possibly) separates to pair with my ML ESL 13A and Lumin S1 streamer/DAC. I'll be taking delivery of the speakers in 2 weeks. The Lumin is my only source (Tidal/Qobuz). I'd prefer an integrated amp, but am open to solid state separates. Budget: around $10k. Listen mainly to acoustic singer/songwriter rock/alt rock. 

I've heard that the ML 13A's can be a little bright when paired with the Lumin S1. Not looking for bright. Interested in Luxman pieces- they seem well-built/well-liked, but the 509X looks like it may contribute to the bright sound of the current components... stability into 2 ohm seems pretty important for these electrostats...