Hello,
I’ve paired B&W with Marantz together for a long time with very good results. The PM7000n Integrated is an excellent unit. I owned one for a year and paired it with B&W 706s2 and a subwoofer and was very happy. I eventually moved up to the Marantz Model 30 integrated and am happy, but I really enjoyed my time with the PM7000n. The Marantz would be my choice based on quality, and ergonomics. I’ve owned Rotel, Yamaha and Arcam and all will work. The 501 from Yamaha is getting a little old and probably up for a refresh soon. I hope that helps
Rick