I'm not seeing even one trichome that's turned amber... think you need to wait a bit longer! That being said, it all depends on what you want out of your smoke... Chopping now would give you a cerebral high without any "danger" of couch lock... if you wait for the amber and see about 10-20% of the trichs that color, you'll have a nice balance between cerebral and body relaxation... you can harvest "late" where most of the trichs are amber - and that will put you on the couch... So YOU decide... what do YOU want? :-D
Good luck!