Both are excellent sponsors but we all know which one I will recommend. AEBN has the highest bit rate and the largest amount of movies.
http://www.aebn.net/index.cfm?refid=AEBN005279
On the Contacted By form please select "Stephane Marchand"
Check out this link to see how AEBN builds up over time.
http://www.freehugemovies.com/aebn_profits.html