Right now, I'm shooting with a Nikon d80. I own 2 lenses...18-200mm VR and 50mm f/1.8 prime. I also have a sb-600 flash & a lightsphere that I can use on the flash. I don't really use the flash much though...I prefer to shoot with all natural lighting/no flash if at all possible. My usual subjects are my kiddos but I really like the lens to be all purpose & excellent for lowlight and movement & able to have super clear/sharp images. Any ideas on what lens I should go for next? Sample photos with the lens you recommend would be even better!