6,000,000 Brazil traffic last month – What would be a good CPM network?

Hello All,
We have a large number of Brazil traffic for our live streaming site.
We are getting more than 6MM page views per month from Brazil and more than 16,301,226 impressions served.
Current provider is paying about 0.07eCPM but would like to get better deal.
I have considered/apply to cpxinteractive, Adfunky, Harrenmedia, Rightmedia, boo-box, Smowtion, and Adnetwork.net
Has any of you had any experience with above networks or any new ones you can suggest us for Brazil/ South America traffic?
I have almost ruled out Harren-media and Adfunky because of their reviews on forums.
Thanks all!

See original post by digital_man