It's a personal preference. A plant ripens from the top to the bottom so if you cut it too early then your lower buds will be fluffy. If you wait too long then your product will not be as sticky or as smelly.
I see them as 2 weeks away. If you don't have one already...get yourself a hand-held microscope (radioshack has 'em for $15). Make sure you get one with a light. Then look at your trich's....clear=not close, cloudy=getting there, first signs of amber...chop away.
Flushing is a myth. Yellow leaves are "normal" is wrong. Click on any of my signature links and find a yellow leaf or the mention of flushing....neither are there.