I've wanted this lens for a while now, and yesterday, after shooting a bit at 18mm, I realized I almost NEED it. I do a lot of nature and the occasional landscape shots as well, but what I really want it for is concert shots, I go to a ton of local shows to shoot for friend's bands and the like.

I use a T3i currently but will be upgrading to a 7D (or hopefully a 7DMkII if it comes to reality) by summertime. Does anyone else use this combo? Thoughts? Pros? Cons?

Thank you in advance.

Also, as a bonus, here is what I think is my best shot of the day yesterday. Wish I had an ND filter to make this a better shot though, 1/3 a second isnt quite long enough...

Here's a link to full resolution if you want to take a real close look.
http://i.minus.com/ixd5aq5CAqPik.jpg