You would look great either way hon, do whichever makes you feel best on the inside. How you feel on the inside will exude and always compliment the outside. Whichever style you choose to keep though, I would definitely update my pictures just so the clients know that "what you see is what you get"
No one would think that your reviews were fake due to your hair color, we all go through physical changes and yours have really been amazing; keep up the great work hon!
Like BFCjosh stated, your friends don't pay the bills, these Gents do! Just keep your happy medium