"Oh and the EF-S cant fit on a 5d or 1D shoudl you ever upgrade, the sigma can and apparently yields good results even on the full frame."

I'm agreeing with you Richard ;)

And here is mbp - they had a 10-20 for £249 last time i looked, but if you want a new one you are paying £264 at onestop digital (which is what i am going to be doing):

http://www.mpbphotographic.co.uk/index.php?id=26&category_filter=41

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography