I've gone for what I perceive to be the best balance between performance & cost - as you mention, Jon, the price quickly escalates.
From my perspective it became a question of diminishing returns: I need the performance, but not all the time. When in ArchiCAD, the base configuration should be more than ample - and most of the time the slowest component is me thinking the project through...
But, when we move onto the CGI and visualisation we want as much performance as possible, hence the choice of: 10 cores, 64GB RAM, 1Tb SSD, upgraded video card.
My thinking was also that as soon as 14 or 18 cores are chosen, more RAM is required to feed them - hence big steps up in price.
iMac Pro arrived late yesterday: unpacking today...
Will let you know how we get on.
AC27 Apple Silicon. Twinmotion.
16" M1 Max MacBook Pro 32GB, Apple Studio Display, MacOS 15