Thanks for your input! I purchased a 50 1.4 yesterday as the current rebates make it a little more palatable. I took probably 25-30 test shots on my 5DII and I was pretty impressed with it. NO issues to speak of, a little soft on the edges at 1.4, but sharp all around at 2.0.
If I may suggest, do buy a hood and keep it fixed all all times. The lens extends while focusing which, IMHO carries a risk if the front of the lens gets knocked into something