I need a few suggestions, i think i have researched pretty much everything, but i still cannot decide. I have a D90, and using the kit 18-105mm lenses so far. So i figued the first upgrade would be a 50mm 1.4G from Nikon. Then i realized one of the main uses for the lens would be dogs, specifically dog shows. So i went back to all the pics i took at previous dog shows and checked the most common focal length, i figured this was a good way to do it. And i would say most of them were in between 70-105mm. So i am thinking, perhaps the 85mm or higher would be a good choice. So i researched the new 85mm 1.4G, the 105mm DC, and the 135mm DC from Nikon. And here is my issue, they are all good. My concern with the 105mm and the 135 mm is they are pretty old lenses, and i had read somewhere it has AF issues, and might have trouble with the D90. If anyone can clear this for me that would be great, i couldn't find much info on the lens in regards to the D90. And my issue with the 85mm 1.4G is, its 1600$, and for that money, i could get the 105mm DC and the 50mm 1.4 G. Too many choices. I have thought about the new sigma 85mm, but all the stories of their quality control where ever i read is getting me a little freaked about getting the Sigma. I chose prime mostly because of its low light optical performance, in dog shows, harsh lighting and lack of lighting is pretty common, and flash is not always a good idea. So if anyone has any suggestions, that would be helpful. Here are a few example shots, so you have a idea what i will be shooting. Both these are with the 18-105mm lenses. Thank you all.