If it's top converting and fresh hardcore sites you are after (and a few with some neat twists !!!),
LionDollars has you covered in spades, with no angle on that niche left uncovered (pun intended !!!). They have HEAPS of sites, including:
Coed Sex Scenes
Euro Sex
Euro Extreme Core
Finger My Girlfriend
Fuck Christel
Hard Porno Films
Hardcore Regular Girls
Hardcore Sex Sluts
Hardcore Slut Club
Hardcore Sex
Porno Centerfold
Porno From Paris
Total Euro Hardcore
XXX Porn Movies
XXX Porno Site
LionDollars have over 100 sites covering all the niches, they add new sites weekly to avoid saturation and they also have more than 20000 hosted galleries (OVER 300 per site).
LionDollars pay up to $40 per join weekly by EPassporte, check or wire and they have MORE than 10000 promo pictures with NO watermarks !
They are serious in making webmasters promotions work !!!