Which PPC network to go with instead of adsense??

I own a couple of domains and monetize them with adsense.I would like to switch adsense to some other PPC advertising as publisher combined with popups.The best would be self serve ads and no approval time on the domains.
The reason i would like to change is,these sites that i am using most of the time are getting a high volume of traffic from USA and Canada,but the traffic dies out in a week or two.At that time i am forced to change to another website.I don't want to draw attention to my sites by allowing 10 sites at the same time in adsense and generating good income at the same time.
I read a lot,searched for information,but i got lost in the results.I was thinking about Exoclick/the websites are not adult sites/ might be right,because they have popups and other ads.
The RPM of the sites are around 5$..so i need better results combined.
Do you have any suggestions?
Thank you,

Chitika is the number one alternative to adsense. After this, Adversal and Clicksor are not bad either, but they are not to compare with Adsense.

ofcourse they can not be compared to adsense.I just don't want to use my adsense really on these domains.Chitika...i tried it before..diasaster.I will check the others..thank you.