Thinking of Moving from APSC to M43

Pixnat2 Be aware that your Nikon is much better for tracking subjects with a modern lens like the 70-200 f/4 than anything in m4/3.

Before taking the plunge, here's an advice :

Rent an E-M1 + 40-150 f/2.8 Pro for one event.

Nice to hear from someone who has walked the path I am treading. Rental is a good idea. I think to get value for money, I would need to plan that around a weekend of activities.

Allan Brown Thanks for the feedback on focus trap, af-on, and continous AF. They have given me pause for thought which is what I need sometimes.

addlightness

If you're happy with your Coolpix A for general duty cycles and your D7000 + 80-200 only for very specific applications, then I see no reasons(other than GAS) to move.

It's hard to argue with that. I love the coopix A and high speed (1/2000) flash sync lets you shoot with the sun in the background. I'm not in most of my holiday / memory pics and as bad a rep as the selfie gets, I would quite like to feature in my own photo collections and be in focus. GAS is a very real issue though and I think you are right. With my current set up I can do almost anything. I think I really need to sit down and write a chart on what I need, want, would like to have, nice to have etc and put a value on each of those that I would pay for.

jwilliams

This is something a lot of people often overlook. I shoot a 6D with 24-70/4 and 70-200/4. That covers most of what I need. With smaller formats I would need to get f2.8 zooms for APS-C and f2 zooms for m43 that cover equivalent FLs. I can do things with the FF gear that would require primes in m43 just to get the equivalent f stops.

FF is something on the back burner, certainly with a trio of primes I could cover most bases. As much as I want, none of the offerings tick as many boxes as mirrorless. As I mentioned earlier in this reply, I think I will need to jot a short list of options down on a spreadsheet and compare size weight, cost for FOV other pros / cons.

Skeeterbytes good shots and thanks for mentioning the overcast weather as that is mostly what I will be up against.  Lots have recommended the EM1 so I will take a look after I consider the GAS addlightness mentioned.  At least with a used camera I should be able to resell on ebay for not too much of a loss if things dont work out.
-- sorry if I missed any people out.  I did read all the comments and am grateful.