I've been going around and around on this. I'm looking at picking up a P100-300 (I'd love to get the P100-400 but at 4x the price....). Over the years I've owned several copies of the older Nikon 80-400, I like the 600mm angle of view for baseball, wildlife, etc. I owned one a while ago but the P100-300, like the Nikon, is big and heavy (relatively speaking). Yes I know neither is truly "BIG", but both are right at that point where you have to consider the size when you want to pack the camera bag. So I'm trying to figure the best way to cover the range and manage the size & weight. Options I'm considering given what I already have (P12-32 & P45-175). Option 1: Just get the P100-300 to go with what you already have. Simplest option but I think the gap will bother me. I prefer overlapping my zooms at least a little so I'm not felling like I'm constantly swapping. Option 2: Get the P100-300 and replace the 45-175 with the P35-100 (f/3.5-5.6 or f/2.8). I'm not sure if 100mm would make me feel like I always needed to have the 100-300 with me. But if I did get the f/2.8 I would probably sell off my Sigma 60. Option 3: Keep the P12-32 for it's 12mm and size, add a P14-140 mkII, and add the P100-300. Sell the 45-175. I've owned and enjoyed the 14-140 mkI, but I'm also considering getting the new GX85 so the mkII makes more sense with the dual IS and lighter weight. The images from the 14-150 mkI weren't bad, is the mkII noticeably sharper or just sharper is a lab test? Option 4: Keep the P12-32, 12mm and size again. Add a P12-60, keep the P45-175, and add the P100-300. Before getting into m4/3 I've almost always had something like the P12-60 (Nikon 18-70, 28-105, 24-120 on DX and or FX). So the P12-60 has a pull for me. I had the O12-50 but thin, long, and power zoom just made the handling off for me. And Olympus zoom rings turn the opposite direction from Panasonic and Nikon so it always trips me up a little. I get the feeling the P12-60 + P45-175 would be better optically than the P14-140, but time will tell. I also have the R7.5, O17 f/1.8, P42.5 f/1.7, and Sigma 60. And I missing anything?