You must be looking for the body effects from your ladies. My understanding is that if you wait to long, the THC starts to degrade. I'm not an indica guy, so I always pull mine before trichomes turn amber. Just a preference call, that's all. And it's your call.
They do look very nice!
Actually I prefer more of a head high, I'm just not great with picking harvest time yet. It's one of the few things I haven't been able to get right so far.
Would you be harvesting the AK now if she were your plant?