I think the sampler is worth it. That way you can try out many products and figure out what works for you. As for light vs. rich, that depends on how much moisture your hair needs. If it's dry and needs a lot of moisture, go for the rich. If it gets easily weighed down and/or overconditioned, I'd go with the light pack.
*Poster formerly known as Bailey422*
Here's all you have to know about men and women: women are crazy, men are stupid. And the main reason women are crazy is that men are stupid. ~ George Carlin