Back in the days I switched between two Mac Pro's (with a switcher) because I wasn't able to get both Avid and Resolve to work properly on a single Mac. I could edit the GPU configuration file in Avid to use the same graphic driver as Resolve but I think it was early RED days so I had to fit in a Rocket and the space was limited without a Cubix expander etc.
So, I went to the store and got back with a HP Z820 and it worked fine the first year. Then it started to shut down whenever it wanted to, the auto updates started to drive me insane, the graphic drivers screwed up everything all the time, I got a lot of connection issues and HP could never figure out the reasons for my problems and fix them. With the years it got slower and slower and now it's finally time to get a new machine. This time I will look into the new MAC and hopefully never look back.
What did you pay for your configuration? I hope to get a decent performance out of it without going for the most expensive build.