Using UV filter for lens protection

I'll be taking delivery of a Canon 10-22mm in the next few days. This 
will easily be the most expensive lens I own. I was wondering what 
everyone thought of the practice of using a UV filter to protect the 
lens? I know there may be a risk of vignetting at 10mm although I 
believe some filters are quite thin.

-- 
Paul Giverin

British Jet Engine Website:-    www.britjet.co.uk

My photos:-  www.pbase.com/vendee