2060 super

If you're going to spend ~800 bucks on a GPU, the RTX 4000 is probably the best choice for this particular build. You'll get real-time renders. You'll get REAL 10-bit color. You'll get drivers that are not available to gamer AIB's. Drivers that are specific to Adobe and Resolve.

I really like your setup. Everything looks good to me. If money is not an issue... 1200W is the way to go.