HDX Card or M1Max Macbook Pro?

[andrewrs]

Looking to upgrade my rig to be able to run large mix sessions without hitting the limits of my computer. I'm currently running on Pro Tools 10HD, so maybe just upgrading Pro Tools will open up processing power (via software enhancements in more recent versions), but would love to get any informed opinions.

My current rig: 5,1 Mac Pro, 12 Core 3.33ghz, 64gb ram, PCIE SSD Boot Drive.

Any thoughts on adding an HDX card to my current rig vs getting an M1Max Macbook Pro, basically maxed out on specs? I understand that the new operating system is not currently supported by pro tools and some plug-in manufacturers, but assuming that happens 1st half of this year, what would get me the best performance?