Just go down to next available size.
Its weight not height. She needs to be able to flex the board to control it.
The Lotus has better dampening system then BPRO and infinity, but stiffer to absorb crud and bumps.
The bpro and infinity you will feel more and easier to control the board.
The edge tech the GNU and LIB are better then Viao grip (sp)
What do you mean by better dampening system for the Lotus? She wants to be able to rip through anything and is now leaning towards the GNU Bpro 152?
What is the difference between freeride and aggressive riding?