I am finally going to get a super zoom, I am selecting the Tamron 150-600 based on reviews and pics I've seen. I also chose this due to price, control ergonomics like the zoom rotation direction, and overall feel while holding it. In the running were the Sigma 50-500 , the 150-600contemporary, and the Nikon 80-400. Any last minute words for or against the Tamron? This will be used in the d7000, and most likely will stay on a dx body even after I pick up a fx due to the crop factor.