I'm a rb convert. Used to feed Strategy. I don't think I'll feed any other way now aside from my old man that needs a mash. I feed Progressive Nutrition's ProAdvantage, it's a bit more pricey than the bigger brands like nutrena or purina but it is still so much more cost effective. It is currently running $34/bag.
What pleases me the most about it is my youngsters. I did feed ultium growth to the young ones but with my 9 month old filly we went the rb route for her dam and now for her. She gets 3/4 lb a day and free choice tim/orchard. She looks fantastic as do the rest of my gang.