I've wanted to buy this lens for a long time, and have an opportunity to pick a non-D version for a reasonable price. However, I'm hesitant to add another lens to my collection that might collect dust. I shoot DX, and have that focal length covered by 55-200 and 70-300 zooms, not to mention a manual focus 180 f/2.8 P-C. The 70-300 and a 300 prime (with or w/o TCs) also meet my long telephoto needs for birding and wildlife. Thus, wondering what niche the 180 might fill. The only things I can think of are shots of the kiddo (portrait headshots, sports, etc.), perhaps some street and landscape work. But thought I'd throw it out there and see what y'all suggest. Mainly looking to hear what 180 f/2.8 owners that use the lens on DX find it to be particularly suited for. Thanks in advance!