What is the best dog shampoo?

I just got my first show dog. She is an australian shepherd, and I am soo excited to get her in the ring. She is a black tri color. Does anyone have suggestions on shampoos, conditioners, or other grooming tips?What is the best dog shampoo?
There are countless good ones but what I would recommend is to check out the ingredients. Look for shampoos and conditioners with natural ingredients like Aloe and Oatmeal, both natural mosturizers that will help your Aussie be soft and shiny. Avoid those that have ingredients you can't even pronounce and that you are unfamiliar with. Also don't forget high quality foods like Natural Balance, Wellness, Solid Gold and the like. Those foods don't contain by-products, corn, wheat, glutens and all the bad stuff that shouldn't be in any dogs food and they do contain Omega 3's and 6's also for your dogs skin and coat. Be sure you check out your dogs food for those ingredients if you aren't already familiar with dog food ingredients and what they mean. Good luck in the ring!