I've been shooting with a nikon 18-200 VR and a 50/1.8 for quite some time now, and find that most of the shots I like to take are at the widest setting. I'd like something wider than the 18mm wide end I have now. I generally shoot landscapes. I've read extensively about the options out there, and the only ones that got real consideration were the nikon 12-24, tokina 11-16/2.8, and the tokina 12-24. I briefly considered the nikon 16-85 VR, as a jack of all trades walk around lens, but think I'd still end up wanting something wider. For how I would likely use this lens, I think the tokina 11-16 is probably too limiting. I was about to order the original tokina 12-24 ($400), when I saw a local Craigslist ad for a mint condition nikon. The lowest he'll sell it for is $650 (I offered $600). It seems like a fair price for that lens, but even so I'm waffling a bit as to if it's worth the extra $250 over the new tokina. I buy used/refurb equipment all the time, so I'm not concerned in the least about having a new vs. used lens. Any thoughts or advice you all have on this is useful. In reading all of the comments and reviews on the web, the tokina looks to be a strong contender, so perhaps the $250 could be put towards another fast prime or a better flash.