My wife and I both love our 50mm f/1.8 and 85 f/1.8 primes. I'm trying to decide if my next purchase should be a Sigma 35mm f/1.4 ART, or a 7D2.

The 7D2 looks like I should expect an extra stop of usable ISO, which will be great on overcast days shooting agility, or indoors shooting Bran (the black puppy)... but a 35mm f/1.4, that's sharp at 1.4 looks like it would be more interesting.