Depends on what type of buzz you like smokey, chop when cloudy for more of a head high, chop amber for more couch lock body stone and 50/50 for best of both, beware tho you can get an odd strain that doesent change to amber and can stay cloudy, quite rare tho.
Post some nice close up pics ae and we will give you a guesstimation on when they will be ready! the last two weeks tend to be the most productive for bud growth, sometimes well nearly all the time, its not until you have chopped the plant and you are trimming it that you start to see that you have done well
My opinion on tric colour is...
If you want a confusing, headache filled, sleepy couchlock harvest at amber.
If you want a nice chilled, pain-reliever with medicinal properties you want to harvest an indica at cloudy.
If you want a soaring head high, harvest a sativa at cloudy.
If you want to get the full effect of your strain, harvest when the chemicals are at their peak, don't try make a plant something it's not by degrading the cannaboids. When a tric turns amber the THC and other primary chemicals are lost, leaving CBD (I believe, could be CBN, always mix those two up, it's a mental block or something) which is what gives that dirty, dizzy "couch lock".
So anyways, if you want a different buzz just change genetics