Hey, what i would do is get to know alexa.com That way you can eliminate some of the really low traffic sites off your list.

Or just get sparky alexa toolbar, its what i use to determine if the site has high traffic or not. I really high traffic site will be under 20,000, decent under 150,000 rank, moving up would be around 300,000. Any higher and they still need some work.

You should also do a little research on the ddl sites, i noticed you added my link to my ddl site which obviously makes me happy (http://www.ddlmafia.net) but we actually do not accept porn yet so any submissions you submit to us will just be rejected. If you have any questions feel free to contact me i will be more then happy to answer questions for you.

You can get my contact info from http://ddlmafia.net/faq.php#contactUs