Another really good network that is super high integrity and treats affiliates right is
AdValiant. They are more on the CPA network side of things right now. They are coming onboard as a 5 Star program, so you know they have to be pretty high quality. I don't normally endorse CPA networks.
Here is some info about how
AdValiant is different and part of why I'm impressed with them.
Jivan Manhas on Why Advaliant is Different - Relevantly Speaking - A MediaTrust Blog