Luxman sounds like Luxman looks, shiny and technical. I would recommend sticking with Accuphase
I’ve not heard Accuphase, but that’s absolutely not how I would characterize the Luxman integrateds I’ve heard at all. Strong extended response in the bass and treble, liquid midrange and glass smooth top end. In some ways perhaps boring in that they don't bring any more excitement to the music than what is in the recording while being super easy to listen to with a lot of gear.
If you are looking around for variety though I suggest you consider getting something you can afford in addition to your current set up, as opposed to replacing it. Perhaps a juicy 60W tube integrated. I like the Rogues.

