what is the best paying?

I have been looking around trying to find the ad network that pays the highest..
Can someone tell me which does out of:
http://www.doubleclick.com/
http://www.viralyticsmedia.com/
http://www.tribalfusion.com/
http://www.burstmedia.com/
http://www.valueclickmedia.com/
http://www.casalemedia.com/
http://www.bluelithium.com/index.html
and
http://www.gorillanation.com/

See original post by sroberts1994