I have used this shampoo for many years and always seem to come back to it.  It's not too terribly expensive compared to some, and it makes my hair oh so soft.  The Redken all soft line also makes a heavy cream super treatment that I use once a week.  It's amazing.  If you have dry hair, give this stuff a try.  It smells nice and light too.  The best!

Redken all soft shampoo

Redken all soft conditioner

Redken all soft heavy cream super treatment