Compared to all those Amazon prices, I think everything would be a little bit cheaper if you are within reasonable driving distance of a Microcenter. Getting one of their bundle deal might save even more on top of that, and there's also the possibility of lucking out on an open-box item in-store.

Your 64GB DDR5-6000 CL30 RAM is apparently about $50 more than it needs to be, compared to the cheapest RAM of that spec on PCPartPicker.

From the description of how much and what kind of gaming you do, you'd probably be fine with a 9060 XT (16GB) ($350ish?) or maybe even an Intel Arc B580 (12GB) ($250ish?). Just don't get an 8GB card; they aren't future-proof enough.

Finally, if compactness isn't actually a need, you could probably save some money ditching the ITX motherboard and SFX PSU in favor of regular ATX ones, even if it causes you to have to spend a bit more for your case.

Speaking of the case, I was also considering a cheap Cooler Master case (a Q300L) for my recent build, and while it looked good on paper, it wasn't so great when I saw it in person. For that reason, I'm kinda skeptical about the NR200.

It's exactly the opposite of saving costs, but cases last a pretty long time. I'd consider splurging on something that's actually high-quality, like a Fractal Design Terra or Lian Li A4-H2O. (I ended up getting the latter myself, which I found as a discounted display model from Microcenter for ~$50!)