I have applied to and received offers from several UK universities and so far I have narrowed down my choices to Nottingham (Int. Law), Warwick (Advanced Legal Studies) and Exeter (Master of Laws). I did not apply to the London Unis, as I spent my year abroad at KCL and prefered not to go back to London and for the Oxbridge Universities it was simply too late to apply for the 2012 entry.

Thus, it would be great if anyone could tell me which of the remaining three universities named above have the best reputation for postgrad law studies, especially on an international level? Or maybe some personal experiences at either of them, both academically and concerning campus life?

I am really lost and starting to go slightly mental (I have compared course contents and rankings and forum entries etc. far too much to be considered healthy...) so any help would be deeply appreciated.

For the best reputation for postgrad studies and international level, you can discount Exeter. It's a good law school but not in the same league as Notts and Warwick.

Now for Notts and Warwick - there isn't much between them when it comes to quality. They both have highly regarded law schools, and both have very nice campuses. You may want to start moving your attention away from the ranking (yes, they will drive you slightly mad and they are unreliable) and start looking at which law school specifically matches your legal interests. E.g., if you're interested in HR law, go to Notts.