Thanks for the CPU upgrade insights. I'm definitly going with at least 16-cores because I have to say, my speed impressions of the 3.5/8-core is not very favorable compared to my 2012 2x3.46 12-core. Many times, whether it's booting or other Finder tasks, it sometimes seems to lag for no discernable reason. And I haven't even begun to start using this machine for its intended tasks (still in the process of migrating my old system along with other some pretty severe setbacks that have occurred).
I definitely appreciate the feedback with Photoshop that showed marked peformance increase between 12- and 24-cores.
I immediately added an additional 64GB to 96 the moment I pulled the machine out of the box, but it sounds like I would probably need to jump way past that for Photoshop. To maximize RAM channel utilization, I will probably add 2x 8GB sticks to bring those total to 6, and another 4x 32GB sticks to bring that total also to 6, for a total of 240GB.
My first step after realizing that the puny stock 256GB "flash" drive wasn't really good for anything for my needs, I've ordered a 4TB kit from Apple (should have just optioned that from the beginning) because adding up the cost of getting aftermarket bootable PCIe cards and 4TB+ NVMe stick(s) would be close to the Apple 4TB kit. And I save a PCIe slot for something else...
Anywho, that M1 Pro and Max demo'd by Apple seems amazing, and I'm anxious to see what the spec's would be for the future M1-incarnation of the Mac Pro, which I will eventually jump to.