I'm using 14s, although my barry has 26.5" to 28" scales, so this is less ridiculous. The low A string is 0.068 I think. They're D'Addario Baritones (can't remember the exact details, and I'm currently at work), although I have also used the EJ22s on a 25.5" ibanez for low drop-A, and that worked nicely, too.
I was intrigued by the Newtone strings, but haven't been bothered to call them up and discuss exact requirements just yet. Plenty of other things to deal with first!!
Roo