So I am looking to start building an email list in the MMO niche. I have a pretty substantial budget and after much deliberation I have chosen to use PPC to build my list as I feel the traffic is of better quality than Solo ads. My question is which ad network is better for list building, Adwords or Bing? Is one better than the other? Just a note, I do have quite a bit of experience in PPC and can afford to lose some money.