Many of us start with Deva, think we like it and then move on to other things. IMHO, there are tons of products that are better--can't guarantee they are cheaper. My salon carries the Deva products but don't let them use them on me. I find the NoPoo very drying since they changed the ingredients a few years ago.
My hair prefers the more natural products from the online, boutique type companies.
The best thing to do is to determine your hair properties. Here's a link to help: Live Curly Live Free - Home
Once you determine your hair properties, you can look for people who have hair like yours and see what they use (most have it in signature.) It's a good place to start.
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