You don't mention your texture, so it's hard to advise. The best way to choose ingredients is to look for people with similar hair and see what they use (in signature.)
Around here, Deva is a love/hate line. Many of us start out with it, think we like it and then move on to other things we like a lot better. My salon has Deva, but I won't let them use even the NoPoo since the ingredient change several years ago. I find it very drying.
Many of us rotate products. My hair has always satiated on product, even back in my shampoo/conditioner only days. I wet, use a rinse out and style every day. Seldom use any one product more then once every five days.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me