beagle1

don't get the 24-105 for a crop model like the 77D look at the Canon 15-85  or for 'sharper' images a large aperture prime

go with a used or refurbished 5D3 www.flickr.com/photos/mmirrorless

small - light - connects with android www.flickr.com/photos/mmirrorless

there are wider and longer but start with the inexpensive 50mm 1.8 STM www.flickr.com/photos/mmirrorless

Olympus is good, I use a mirrorless system that can easily use the big DSLR lens and the small and light "pancake" lens  ........... it's nice www.flickr.com/photos/mmirrorless

I get over 200 "face - ball - action" shots with the M5 and old original 100-400 shooting college lacrosse (similar field sports) www.flickr.com/photos/mmirrorless

that's it, buy the lens then the camera www.flickr.com/photos/mmirrorless

you're getting there www.flickr.com/photos/mmirrorless

I use to have the 400 prime but found the 100-400 much more versatile.  maybe get one of those small folding monopods www.flickr.com/photos/mmirrorless

750d is good, maybe budget a little more for the new 77D www.flickr.com/photos/mmirrorless

those are both full frame lenses, good but if you're concerned with weight look at the Canon 15-85 or Sigma 17-50 2.8 www.flickr.com/photos/mmirrorless

looks good, for most wildlife I use the 100-400 www.flickr.com/photos/mmirrorless

I occasionally use the 50mm on the M5 www.flickr.com/photos/mmirrorless

the definition of "best" can be subjective ! www.flickr.com/photos/mmirrorless

you have all the gear for good pics but I wouldn't drag that 100-400 around Disney all day with the family.  leave most at the hotel and just take the 24-105 For me at Disney it's the 22 f/2 ...

you're comparing a full frame 6D with a crop mirrorless in low light?  sure, the full frame is going to win every time www.flickr.com/photos/mmirrorless

I'll vote 22mm f/2 pancake ..........  but it's my only M lens www.flickr.com/photos/mmirrorless

don't worry about selfies, they all use the Canon connect and bluetooth apps for remote shooting. between the M5 and M6 look at whether you want a detached EVF the 18-150 looks good but I use the ...

the 100-400 is nice but it's nothing like the 400mm 2.8 or 200 f2 www.flickr.com/photos/mmirrorless

I use the Canon 22mm  f/2 pancake lens on a Canon M5 mirrorless - works every time www.flickr.com/photos/mmirrorless