WANTED: CPM Banner Network, Send LARGE Traffic & Small Minimum Deposit

Hi All!
I have searched this forum up and down and I realize there are thousands of CPM Networks. However, I find the small networks can not send me the amount of traffic I need. (I fill their inventory too fast) Also, the large CPM Networks require huge initial deposits. While I spend $xxx.xx on advertsing per day, I do not like to tie up all my money before testing a network.
Adwords converts great for me, but I need more traffic.
Any recomendations?

See original post by Faulk55