Personally been using the SN570 as a secondary drive for games (it is at about 3.5tbw so far and 100% health) and had purchased it for about 7.5k a couple weeks after it launched in India (about a year old ig), and when transferring files form my boot drive (1TB SN550, which I purchased for about 8.5k about 2years ago and is at 53tbw & 98% health), I get 950-1050mbps transfer speeds when I move large steam games (50-135GB in size). I suspect the bottleneck is the SN550, as I should be seeing about 1500mbps with the 570 but even 1gbps is more than enough speed for me lol. I don't think I've ever used the cache of the 570 fully; although I did use up the cache of my SN550 when moving 3 game simultaneously at which point I still got over 400 or 500mbps iirc.
Overall, the SN570 will be the best vfm drive, plus 5yrs warranty is peace of mind; and is more than enough nvme for anyone outside of professional applications like 8K video editing or some other niche.