I am looking to purchase a new lens for my Nikon D7000 to complement the Sigma 150-500mm since 150mm is a bit too much at certain spotting locations. I am hoping to get something that would also be my primary shooting lens for everyday stuff, something in the range of 35-150mm. I am on a pretty tight budget so I can't afford to drop a grant on the Nikon 24-120mm for example. Any suggestions are welcome. Thanks everyone!