You cant go wrong with Mech Bunny. It provides a great solution for the mobile version of the site. People focus on desktop, because they get more traffic there (lets say 2/3), and forget about mobile versions of their sites, and this should be the most profitable thing (as earnings are much higher here).
The best way to go, is to set up Mech Bunny, and set up the mobile version of your site with
Bitter Strawberry +
Sex Goes Mobile + mobile popunders from
Plugrush combined. This will turn out to be the most profitable part of your website, right away.
Other ad networks to consider, are
First Mobile Cash, and
VPS Mobile, but these are somehow more advanced.