SecretaryX links to quality and good adult sites:

Xminx:
A wide variety of teen and hardcore films, indeed it bills itself as somewhat of a "movie archive". While this site largely focuses on a variety of hardcore films, it does tend to veer towards either teen (18+ of course) films and your more general mainstream porno flicks. You won't find much out of the ordinary here, but what you will find is a nice archive of great porno flicks at a very good price. The thing that sets this site apart from others is its adoption of high-quality encoding techniques. And while you still have the ability to download the films in both MPG and WMV formats, you will find that they are almost the exact same quality as your typical porno DVD.

XXXAnalSluts:
The hardest and fastest anal sluts website around, no bull. Yes, this is a very "full-on" site, and it really does cater for the anal niche market, however it does that very well. The site is very simple, but very bold, but what it offers is an excellent range of hardcore anal movies. Now these movies are not explicitly full-on hardcore anal, but rather a mix of good hard-core and anal movies. Most of the movies are pretty mainstreamish, but don't let that stop you, there truly is a great range of extreme porn movies here, and some of the anal movies are second to none. What impresses the most about this site is that it has a wide range of anal, from your young teen chicks to your more mature women, if you like anal, it is all here.