Tripods are one of those things that can be very difficult to judge objectively using just published information. Unlike a camera whose specs you can read and understand, finding a good tripod is much more subjective.
With that in mind, I was really happy to see that DV.com has published a large tripod review. They’re looking at primarily high-end tripod systems, but there’s still a lot of good information there. You might need to log in to access the article.