I've been thinking about getting a new lens(haven't we all?). I've thinking something around 18mm as that is where I take by far the most photos according a quick grouping of photos by focal length by Lightroom(and I have another lens for 55mm+). I've been looking at the Tokina 12-24mm as it looks to be pretty good for it's price when buying used Have anyone gone from the kit lens to the Tokina 12-24? How is the difference in picture quality? Any other lenses I should look at?