She is pretty close to what I would consider "harvestable", but another week maximum would be my maximum too, with 90-95% brown pistils.
This way you will get buds with peak THC levels and a snappy mind bending high.
If you prefer a more sleepy/heavy body type of stone, with less THC and more CBD and CBN, give it another 2 weeks or 100% brown pistils.
Hope this helps, Organoman.