which bean would be better choice
Pinto is closer to black (I think), but fava is much healthier (ref: Dr. Oz).
I'd use the pinto, personally.
I vote pinto as well.
Just based on size I would go with the pinto beans or the canellinis. The flavor shouldn't be affected too much. Maybe the texture a bit.
kidney beans, would this be better choice for a sub for black beans?
No. Pintos are much better substitute. Texture of kidney would be to different.
well, jmburns you were right...
You could actually substitute any of those beans for the black, with making something like soup u can really interchange things to whatever you might have on hand