So, I went to the store in the city today to try a 23/2 out. There was only one and it was part of a bundle, but I got to give it a little test. AF is definitely noticeably faster than the 27, and from what I could tell within a store, I did actually prefer the FOV - things seemed to frame up nicer. Long story short: no money down but I have one reserved for when stock comes in, with a nice bonus that the store is having a 48-hour sale this weekend so it's got 15% off and even though the offer will be over by the time it comes in, I get it at that price. Not a cent more than Amazon either.