I bought my 28-300 as soon as it came out and used it with my previously owned D700 and it became my walk around lens ever since. I gave my D700 to my daughter when the D800 came out and this lens is my walk around combo with my D800. I recently returned from a river cruise in Europe where I took this combo plus a 16-35mm lens. Almost 100% percent of the pictures taken on this trip are with the 28-300mm. Visit my website listed below. Go to the travel tab so that you can evaluate the IQ of this lens. I noticed that you mention the 14-24mm lens which is a super lens but quite heavey. I do not own this lens but as I mention above, I have the 16-35 which by the way, it has impressed me. Many of us feel that there is an absolute need to carry a wide angle for narrow spaces. Although I do agree with the concept. I just reached the big 70 and I have decided to use the KISS method. Just keep it simple and don't overload myself with extra gear that I later on realize that did not use due to the extra weight, changing lenses and missing shots as a result, people bumping into me, and most important, the always present dusty environment found in many instances forcing me to retouch the skies in Photoshop as a result of a dirty sensor.