Heya zirpp!
Definitely in the harvest window for sure. If you harvest now you will experience more of a balance between a head high and couch lock. If you wait a little longer until trichromes are 30% that would give you more of a couch lock smoke. I wouldn't say pistils are always a clear indicator, I have had plants ready to chop with 30% white pistils left and plants with maybe only 10% white pistils left.
Cheers and enjoy!