For sure the best way to get high quality traffic is to build traffic from SE.One of the ways to built SE traffic to the blog is to add it to different kind of niche blogdirs. It's hard way, but it's perfect for long term. But in case if you want to test your site, to see the ratio you site will have, you can try to buy some high quality ad traffic for test purposes. If you want to do so, I would recomend traffic from
Ero Advertising. They have really good traffic in all niches, with really good GEOIP filtration and anti-cheat system built-in.