Help to choose the best CPI ad-brocker

Hello All!
I’m running a big tutorial site and would like to sell my adspace with the help of ad-brockers. The thing is that Adsense is not very effective in my case, so I decided to switch to a Pay-Per-Impression system. Could you please give me an advice – which ad-brocker would be the best for my website?
Thanks in advance.

See original post by georgekgk