Here are a few good starting places.
http://orgymania.net - It’s a pay site, but I follow a few of the artists on tumblr. Good stuff and a lot of content created by women
http://www.hentai-foundry.com/?enterAgree=1&size=1550 - lots of good artists hang out around here.
http://g.e-hentai.org - Don’t get lost
Somebody remind me later to post links/ recommendations for smutty artists that I like.