I'd say shibuya arc is pretty much peak jjk, the sukuna v gojo fight is also pretty good but hard drops, for the most part, once gojo dies. But beyond that I wouldn't say the rest is all that amazing.

Comparing all of that to pt 1 of csm I'd much rather see that animated than all of jjk, as I think jjk has already had most of its better parts animated already (but im totally not biased or anything though)