The tone would be the make or break detail for me. Even over the exact nut width. Your hand will get used to almost anything within reason. I could also get over the peg head if I liked the guitar playability and tone enough. However, I'm of the opinion you really need to take your time and get the right 12 string for your ear, or you wont ever be happy beyond the initial honeymoon. For me laying a bottleneck slide on them often tells the truth. They either sound fat and rich or like broken glass on the pavement. One thing I like about the brands you mention is the slight lack of sustain and some funk to the tone. Although I would hate to get real attached to a guitar that might not last.