I am looking for feedback from folks who have had (or still have) the P12-25/2.8 for a bit. The excitement of a new lens can give you rose-colored glasses, but how about having it for a while? So, my questions are -- if you've had the 12-35 for a while, do you still have it? Still use it? Still love it? Anyone end up just selling it on or having it collect dust? Why or why not? Thanks!