What AV amplifier for 4 x b&W + centre

Thank you.  Definitely 4K 

I have no intention adding more speakers therefore most likely Atmos is not a must.  
Room correction sounds like a nice think to have.  
I like sharp / clear sound and use the system 50/ 50 music / HT 

would 10k be enough to spend on up to date good sounding processor ? 

 A B&W sub adds a lot to the sound - I like mine although I have floor speakers with decent bass - still the sub adds something in my humble opinion...

Just ordered Velodyne DD 15+ 

only the processor left to sort out 

thank you all for your help to date 

Sorry, I’ve been out of town and driving/traveling a lot.

For your budget and requirements, the Krell Foundation 4K comes to mind. It’s $7500 retail and about $4500 used. Make sure to get the latest "4K" model. The earlier model does not support 4K. The Foundation has excellent power supply and audio stages - excellent audio resolution. It is only a 7.1 processor, so you are paying for probably the best 8 channel processor that still supports 4K (everything else is already doing 13-15 channels). Krell has it’s own ARES room correction, which is pretty good but it’s been said that others are better. That being said, the Krell does not support HDR (high dynamic range, which is extended color depth). If HDR is a requirement, you will need to look elsewhere.

If you want HDR, maybe look at a used McIntosh MX-160 (probably around $8-9k). It’s based on the Lyngdorf DSP/processing board and software, but uses all McIntosh power supply and DAC/analog stages. The configuration flexibility is excellent for a processor. The room correction system is supposed to be very excellent.

Alternatively, I have heard that the Audiocontrol M9 has excellent sound (retail $8900). However, the configuration flexibility is somewhat limited (i.e. you can only do a global subwoofer crossover frequency settting, etc.).

A NOTE: I am not a fan of room correction. I prefer doing acoustic treatments and very minor manual EQ if I can. However, others love room correction.

The Mac is pretty old tech without getting the brand new one. The Arcam you already have is pretty nice. You could move to the Arcam AV860. Another option is the more traditional route of the Marantz 8805. I like the frequent updates from Marantz. It’s a really good processor and will be rock solid.