I have looked around for top end CPM networks and have come across tribal fusion, burst , casale, and valueclick media (correct me if i left any out). Which network would be better catered to providing non-targeted ads for a top trafficed US site? Which have the best ecpm rates for media ads and will higher traffic bring better rates? Also I'm pretty confused on the concept of setting a minimum ecpm rate, how do you know what to set it to and would it be based on? Thanks.