http://ontheissues.org/Ron_Paul.htm
On the issues is pretty trustworthy.. The main problem with that site is if a candidate doesn’t have a vote record on a specific issue, they are rated right in the middle. You shouldn’t have to worry about that with Paul because he has been in DC so long.
At the very bottom of that page is a chart where they map out his votes, as you can see, he rates as a Moderate Libertarian- again, this is based on his votes, not rhetoric.