Entirely depends on what you need and your horse. Some might say the absolute best is a PS Sweden, but no way I'm forking over that much cash.
You need to decide what you need in a bridle. Flash vs no flash. Crank noseband vs not. How wide does the noseband need to be to compliment your horse's face. Style of brownband. Anatomical crownpiece. Once you narrow that down you can find the best quality for your budget.
I've got a Stuuben bridle I got second hand and it's wonderful quality.