I think you have gathered enough feedback about both programs by now (I have better performance with Adsense as well). I believe nobody can tell you the truth until you try it out in your site Do let us know how these two programs fare and we may learn something
i have most set up with Adsense, but one banner with adbrite, that i just specify a very high eCPM so the Adbrite ads only show up if they can beat that... www.aussietravellersforum.com