Hi all. I am a D800 user with Nikkor 16-35mm, 28-300mm, 50mm 1.4D, 105mm AFS micro and some other older nikon lenses like 55 micro, 105 mm f2 etc. I am a hobbiest, and taking family, travel and landscape photos most; and like micro work as well. Mostly I care the color rendition, sharpness and focus accuracy while taking photos. I am impressed with the photos that I take with 16-35 mm in terms of above criteria. That's why I can set its photo quality as a reference to my questions. Altough there are many positive posts on Nikon 28-300mm's practical use and performance, I am not very pleased with its picture quality. I must confess it is a very practical lens fitting many purposes, but the results are generally below my expectation. That's why I am considering replacing it with a better counter type. I am not very much interested in a set of 24-70 and 70-200 2.8s, due to cost and benefit (in my case) reasons and I hope I can get to some other solution which will meet my expectations - (16-35 mm is not a 14-24 at the end, is it?, however meets my expectations). Primes are always on one side of my mind; but if possible I'd like to enjoy the practicality of 1 or 2 zooms. I am not into low light situations a lot; or agree to compramise to an extend with higher ISO; but getting easily to and above f5.6 on the focal lenght annoys with the deeper DOF. I'd be very happy to get your suggestions for above. Secondly, I am interested in using ND filter(s). As I do not want to invest in it in the beginning; would you pls advice which grade to use for testing and on which lens/focal length. Thx in advance and enjoy the day and the weekend. Ismail.