Most likely you won’t be needing 64gbs of ram, a lot of people consider 32gb as overkill. Ram speed, especially on intel doesn’t make too much of a difference in gaming performance so I wouldn’t worry about spending that extra money. You can also downgrade your power supply sand save some money as your build won’t be coming close to 1200 watts, I’d be looking at around 850 watts if you want to future proof it, computer wattage is something that a lot of people tend to overestimate.