Anyone out here using this lens? I'm planing to buy one with my Tokina 12-24mm... since I'll use the Nikon for portraits, animals, flowers, urban etc(in other words, everything my Tokina won't be able to do)... and the Tokina mainly for landscapes. I've read reviews on the lens, and no doubt- looks like a sweet toy... but I'd like to hear some personal opinions before buying anything. Also, do you guys think I'm doing a wise choice? Or will the Tokina be enough? Since it's only going to 24... I thought of getting the 18-200mm so I can cover a much more flexible range and don't know to buy any other lenses for a while.