Good Lord, Villette!  You've tried EVERYTHING out there! 
  
I'm currently using the Chris Christensen Day to Day Moisturizing Shampoo and Conditioner.  I also have the Ice on Ice conditioning/finishing spray.  
While I like the way it smells and the way it makes the coat shines, I've found that after a few days it's back to the same ole dull coat. 
Now, when I took Woodie in for a check up, he had dry skin.  The vet sold me a bottle of VET Solutions Aloe & Oatmeal Shampoo.  Not only did this shampoo smell like the CC products, it made the hair glisten.  I last bathed Gracie on Friday.  I was brushing her last night and her hair was still SOOOO soft and shiny.  It is also a conditioning shampoo and even though I still used a conditioner, I really didn't have to.  She still smells good and like I said, her coat looks beautiful.