Originally posted by Cerebum Others have mentioned centering issues, but despite this, it is on my list
I debated a long time on purchasing this lens. One of the comments you hear is about softness wide open. After looking through sample photos here, I decided that the key is a properly centered copy. When the time comes, buy from a place where you can exchange lenses easily to make sure you get a good copy. I'm on the same coast as B&H Photo, so it's easy and quick to exchange a lens if it's not up to snuff. And of note, I seemed to get a properly centered one on the first try.
I completely understand having to budget these things out. I didn't buy them all at once. I started to tally what I've spent a year or so back. No regrets, but wow, it does add up!