There will be many answers to this.
We have invested in a P620 with 192GB RAM and A6000 gfx card 3 years ago. Never looked back for price/performance. You would definitely see the performance for big comp setups.
On the other hand, we also have a MacStudio M2 Ultra, for half the price and, well, half the performance, if you count performance by render time. A lot of my time is spent in the UI and they both seem snappy enough for me. I think the M4 Mac mini is on par with M2 Ultra as far as performance is concerned.
Also…
