RE: Board for my girlfriend
After reviewing all your posts here:
I'd suggest the Carve 122 as the S-Type 115 is going to be signifcantly more difficult for you to learn the small shortboard "basics" on.
The C-122 will compliment your GO pretty well.
Yes, try the 111 liter board and let us know how you get on with it.
If you have some specific problems, come back here and we may be able to work you through them a bit more easily that you trying to solve them your self.
Hope this helps,