Dont forget how important technique is to. For me its more important than what product I use. Applying product to soaking wet hair is the only way I get any clumps.
First product I use defines my curls. Right now thats a mousse. I let the mousse absorb into my hair for a few minutes before I scrunch out the excess water. This takes 2 flour sack towels to achieve that. I then add some gel after air drying for about 30 minutes. I let my hair finish air drying and then sotc after its totally dry.
You dont have to pay alot for a product there are alot of store products that work really well. The only product I spend alot on is my leave in conditioner. I havent found a better one than shecentit coco cream.