TK-069 , I'm a big fan of Mika Tan - I thought I was one of the few that knew about her! Jenna Haze is a good looking girl who's up for anything and I used to really like Belladonna but I think she's lost the plot and is fasting heading towards mental meltdown!
At the moment, I'm into anything by Jules Jordan, some titles of reference - Ass Worship 1 & 2 and the Flesh Hunter series, in particular, 4!
These films don't piss around with a story, they are what is known in the biz, as Gonzo. They feature hot girls in quite hardcore mainstream action - a little bondage, anal, interacial, threesomes without going too much into one tangent or becoming so hard that they make you ill!