And OP, I don't know what course you're thinking of but generally it's really good for pretty much everything. For example maths, it's #5 in the country, everyone got A*AA and still finds the course a challenge.
Socially, it's awesome - really friendly, very metropolitan and not pretentious (sure you get the Jack Wills and rugby brigade, but they're still all pretty nice!) and a decent nightlife. I'd recommend it to anyone.