John and Sherlock are so difficult. WHY!? These normal-clothes cosplays are turning into a massive pain. Never underestimate live-action cosplays!
Many people seem to be going with Marilyn Monroe wigs for Sherlock, with trimming. I think I'm going to buy an Arda wig (I've always wanted one) and try my hand at just messing with it until it looks right. I seem to have a talent for just BSing my way through wig styling and making it turn out alright.
As for John, I think my friend and I have officially settled on the Super Short from Coscom in the ash blonde. The "cool ash blonde" is actually a pretty awesome color.
Good luck everyone!