I have been considering selling my setup
5d3
24-70 2.8 mkii
70-200 2.8 is mkii
Cf cards
600 exrt speedlite
To get a 6d
24-70 f4 is
70-300l
Newer speedlite 430ex ii replacement
I just spent thousands of dollars this year and have hardly used the gear. When I do its for candids or vacations. I wonder if I am wasting the money and should sell it to downgrade to something more enthusiast level and cheaper. Also it's just so much to lug around. Just not sure and wanted some opinions.
1. If the reason why you don't use it is the weight, switching from 5DIII to 6D is pointless - the difference is trivial. Ditch the lenses instead. (If the reason isn't just the weight, what is it about the 6D etc. combination that makes you think you would use it more?)
2. How picky are you about image quality, and how much do build quality and mechanical reliability matter to you? For instance, you might find that the differences in image quality between the L and non-L versions of the 70-300 are exaggerated and that the much lighter weight of the non-L outweighs the obvious mechanical superiority of the L version. You might be better off replacing your lenses with 17-40L + 70-300 L or non-L (or, if 200mm is long enough, 70-200 f/4 Ls - they don't weigh much) and fill the gap with a 50mm 1.4.
3. Do you like swapping lenses? If you don't, the prime route won't appeal. If you would rather not swap lenses at all and aren't that picky about image quality, Nikon D600 + 28-300 lens might make sense - just don't look to closely at the results when comparing them to photos you took with your current gear....
4. If the gear you have now is simply too much stuff and you wish you had something simpler instead, consider a tiny Sony RX100, which, despite its size, is capable of near-DSLR quality (crop, at any rate) - the results won't be as good as what you could get now with your current gear if you used it, but you're not....