Elegoo petg and PLA have become my go-to over the past 2 years. Rapid vs pro tend to affect me more with how brittle the end product is than printing speed. I’m using a K2 Plus, but also printed on Anker M5C.

Fun detail: you can order 10kg packs for a good discount vs other shops if you hit their site directly.

My only gripe is they don’t have variety packs of their fancier stuff. Some of their silk is gorgeous.

I usually have gotten about 35-40% rh on my should out of the bag. I still get good quality at that level, but would warn to actively dry a bit if you are in a more humid area for sure.