Hi, I am new in this forum and will appreciate if you help me in choosing a new photo equipment set. I am very confused about selecting the camera type and suitable lenses. Previously, I had nikon d80, 14-24mm for landscape and architecture, nikon 105mm f2.8 VR for macro and 50mm 1.8D for portraits and give them all back after 3 years of use to the place where I bought them. Now, it is time for an upgrade. My problem is that I don't want to change lenses and keep their number at a minimum. Photos I want to take are landscapes and big buildings like palaces , churches etc., on holidays, portraits and family photos at picnic, sometimes bird photos. I thought a lot on it and created some alternatives sets as follows: Nikon D7100 (DX) as the camera or should I buy a FX camera like d600 (but oil-dust problem), d700 (low resolution 12MP), d800 (too expensive) For landscapes, architecture Nikon 16-35 f4 VR (actually for FX cameras but on a DX an enough wide lens) For portraits nikon 85mm f1.8 (actually I don't want a second lens just for portraits, prefer one lens for lands., arch. and portraits but 16-35 mean 35 mm is suitable for portraits for example for head and shoulders shots??) or instead of above two lenses only nikon 24-70 (70mm is okay for portraits but is 24mm enough for lands. and architecture on a DX camera) or only nikon 16-85mm VR (okay for both lands., arch., and portraits but isn't it a little weak in image quality compared to 16-35 or 24-70 ????) For bird photos nikon 300mm f4 + 1.4TC EII teleconverter In between, 14-24mm was a very sharp and suitable lens for lands. and arch. but 1) no circular polarizer filter, 2) no VR like 16-35 3) 24 vs 35mm on the long end so faces are seen more natural with 35mm if I buy the 16-35 for both lands, arch and portraits. Total budget <= 4000$. I have to decide as soon as possible. Therefore I will appreciate any recommendations. Thanks.