Honestly never heard or seen Hegel or Accuphase in real life but for looks and nostalgia factor I really would love to see and hear a new Yamaha integrated.
I heard the new top of the line Yamaha 5000 series gear, so separates. It was interesting to hear them after my Luxman c9000u.m900u experience. I was demoing the Yamaha NS5000 speaker, which are great, but the demo was in a bad dealer room.
My takeaway was that the Yamaha gear sounded very good with the NS5000 speaker, but during the demo I was thinking I would love to hear those speakers with the Luxman stack. There is a saxophone part in the Rolling Stones song SLAVE, and on the Luxman stack I got the sense of the breath going into the sax. With the Yamaha it was not there, but the room was bad.
After some more time to think about it I am now inclined to hear those speakers with an all-Benchmark stack (which I have at home).