why did u sell the 70-200 f4? what was it not doing for you? Im just asking this to understand what you need/want in a new lens. if you shoot sports the 70-200 2.8 non IS, is the best bang for buck. You might want to look for a used 70-200 2.8 IS mk I if you shoot low light venues, if you do portraits, primes are your best bet as you dont always need the flexibility of a zoom. im not sure if the macro 100 2.8 is the most versatile option imho, i mean its pretty sharp, but the 70-200s are just as sharp and similar price. the only thing you dont have is macro. Macro is a speciality lens sort of like ultra wide angles or fish eye more so, unless u specifically shoot subjects close up that requires macro, it will one of those features you dont use.