looking at the canons rumors there seems to be a version two on the way!of this most popular lens also they have changed the lens formula and filter thread size to 77mm,i was just wondering would you consider upgrading to this newer version of the 35 1.4 or just hang on to your old lens,i enjoy working with mine and don't think it would be worth replacing it but will have to see if the image quality is will be better! any thoughts on this.

