Hi, I am June from the Quilting Board.
I have the Bailey 13 quilting machine. I am 74 and chose to not go with the 15 inch because of the cost and my age and how much use I would get from it. If you are are less than 60 years old, I would suggest you consider buying the 15 inch. However, it depends on what you plan to do once you get this equipment. I make quilts for charity and am quite happy doing up to Queen size quilts.
There are also other mid-arm machines that you can find by doing a goodle search.
I also suggest you call Bailey and talk to Chuck. He created this machine and knows more than anyone about it. Be sure to tell him June in Cincinnati sent you. He will probably say "WHO??"
any questions? just ask
June