I havent even done my first harvest but done plenty of research but yeah man i agree they are looking close. Id say as long as all the lower buds are looking mature too harvest is right around the corner. Still got a few white pistils in pic but like you said they are looking close
I would think maybe a week or two. I would just check the trichomes daily over the next week and when the tips of the leaves on the buds start drying up a little more it's probably ready.
Do you have any pics of the whole plant? I could be a little more acurate if I could see the leaves etc.