As much as I want to say AMD because of the open source drivers (I’ve also never had one, but my next card is definitely going to be an AMD one), you mentioned Blender, and last I check Nvidia’s GPUs are much more performant in Blender. Here’s a benchmark www.pugetsystems.com/…/hardware-recommendations/ in there you can see that a 3060 has slightly worse performance than a 7900xtx and considerable better performance than a 6900xt, you’re talking about getting a 6700xt so the difference will be even larger. So if Blender is your primary use case I would go with NVIDIA.