I had a EF 50/1.4, but sold it after acquiring a Leica 50/2 R. Leica is noticeably sharper,and has better clarity. It's a different feeling looking at pics taken with Leica. I am now using Leica with Canon D30 with a split screen and manual focus for portraits. My brother owns a 10D and a 70-200/4 L glass. He likes his L glass, but I am never impressed by his pics. Just my two cents. Keep in mind, manual focus can be annoying some time.
Leica R prime lenses vs Canon L prime lenses
in Leica and Rangefinders
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