I'm a high 2 - low 3 (more 3 around my face, more 2 in the back).
Kinky Curly is my HG product- you can find it at target and although it seems expensive a little goes a long way (i.e. when I had a shoulder length bob a jar of the gel would last me several months).
My sister has medium to thick, very wavy, super long hair (2 a ish) and she get's great results from the KCCC too (when she diffuses it upside down she get's major volume with amazing, defined waves).
I have a love/hate relationship with Kiss My Face Upper Management (my small town pharmacy actually sold it so maybe check it out). It's a cheaper alternative and some people really love it.