Truly at the end of the day it's all up to you , from what I can see here if they were mine I would continue to flower for 2-3 weeks . The orange hairs that you see means that some of the trichomes are clear then turn milky and some will be amber soon enough . Its really hard to tell with the naked eye but the general rule of thumb for many years has been if the hairs are turning orange then the trichomes are turning milkey and amber . The best way to determine this would be to get a portable micro scope that zooms 60-100x you can get them from amazon for like 3 $ this way when you get a good look at the trich's you can see if the head has started to turn amber . Once the trichome's hit 10% 15% amber its time to harvest ! If you do it sooner its not really a big deal but the 2 mains things that it will impact are yield because your cutting the length of time that the plant is growing and potency , how ever if you wait to long you can harm your yield and potency in the same manner. All in all these plants look really good ! I would wait about a week or 2 before harvesting them but thats 100% up to you :) I hope this information helps on your conquest to becoming a grow master ! -Happy Growing!