i have a d300 with the 18-200mm vr lens and must say i'm quite pleased with all the results i get, but i know they could be better as far as image quality is concerned. if i were to get the 14-24mm nikkor, would i notice a large difference? i know this is an expensive lens designed more for full frame cameras, but i'm willing to spend that much on it since it is fully compatible with the d700 and d3, which leaves more options open in the future if i were to decide and upgrade. i'm having trouble trying to decide on getting this lens, or the 12-24mm nikkor since its around 600 dollars cheaper. another consideration would be the 17-55mm nikkor. what do you guys think would be the best lens to go with? i'm fine with 18mm being the widest focal length my lens goes to, so anything wider is a plus.