I'm making the move to Nikon from Olympus and I'm trying to piece out a decent kit. Here are my choices: D90 Body Only + Nikon 18-200mm or D90 Kit with 18-105mm + Sigma 10-20mm If I got the D90 with the 18-200mm I'd like to eventually get the Sigma 10-20mm. If I went with the kit plus Sigma I'd get the 70-300mm later on down the line to handle the telephoto end. I thought I had this figured out until I saw that if I order the D90 plus a Sigma lens from Amazon I get 20% off the Sigma lens. Right now I'm leaning to the kit plus Sigma especially since I've never had a lens that shot that wide before. Any advice would be appreciated.