I recently sold my 40D and much loved 10-22 and am picking up a 5D MKII, I posted something here a while back in regard to a lens recommendation, the 17-40L looks to be a great replacement for the 10-22 and takes the same filters as the 10-22 but so does the 24-105,,
I tend to like a wider view when shooting but also realize with width comes distortion , thats where my quandary comes into play,,
your thoughts
just looking for opinions from people who possibly own one or the other,, like I said, the 10-22 was very nice on my beach wide open stuff,, but certainly did show alot of distortion in an urban environment,, the FF has me a little confused as to the actual width ratios 
