Anything in 3D needs a lot of RAM both for the CPU and VRAM for the GPU. You can do more stuff without taking time to optimize assets and settings. I would start with minimum 32GB of RAM and 12GB of VRAM (cloth sim and other render engines).

You did not mention a budget, so this is for medium cost rig.

AMD Ryzen 9 7950x 16 core, 32Gb and an Nvidia 3060 12Gb, the Nvme drive prices are crashing so a fast Gen4 2Tb and another cheaper 2TB Gen3. Look for a mainboard with 4 memory slots to add another 2x16 RAM later if needed and 2 Nvme slots at least.