<p>I have a 24-70 f2.8/II, funded by selling my 35/1.4L and the 24/1.4L II. For my needs the 24-70 is the smart choice, but both of those primes (as you know) have a special IQ that is sort of like your first sweetheart. You are happy with the current situation, but you fondly remember something that was really cool. I'd keep one of those if I were you. Sort of a compromise? <br>
Incidentally, is the Sigma ART up to Canon L par in your book? I know it's reputation is very good, just wonder what you think. </p>