What is the best affiliate network to market online?

I’m looking to get started in the affiliate marketing business, but there are so many choices out there. I’m looking to find one that is easy to work with, but yet provides a good compensation agreement. Also, I’m asking this question to avoid the “get rich quick” schemes and scams that are prevalent online. My hope is that this business will provide an extra income as I start out, and eventually build it to replace my current income.