Not sure if anyone mentioned it, as I only had time to skim the posts so far, but the thickness of the guitar neck is an important factor. The narrower it is, the easier it is to use your thumb on the 6th string, and the easier it is to reach further apart with your fingers. I recently got a guitar that had a slightly thicker neck (from front to back) and it makes a bigger difference than I thought it would, to these aspects of ease of fingering.