I use Premiere. I don't always recommend it, but if you want the industry standard, that is it. Tons of other free ones, but I am not sure how they will run on your rig.
Just got a new computer this summer, i9-10920x, 64GB RAM, RTX3080.
I went from rendering a 1080p 60fps 20 minute video - taking @30-35 minutes, to now taking less than 4 minutes.
Unfortunately the scrubbing at 4K 30fps or better, moving at FULL quality still stutters and lags a bit, and that has everything to do with data transfer. So unless I render the clips into the project I am always going to get that. THough I put it down to 1/2 quality while I scrub and it has helped significantly. My 1080p 60fps scrub and manuever like butta' though.
Not sure that helped.