First and foremost I would recommend heading to a local shop and talk to them. I like Ronix gear a lot and it looks like Sail and Ski Center is a Ronix dealer that has a couple locations in the Austin area. Go talk to them, find out what they recommend. It is best to create a relationship with your local board shop. They will be able to quickly resolve warranty issues and help you better. I would guess they would be willing to work with you on price if you find something very similar online.
Here is their website.
This is a board I would look at. It has a unique shape. The heel side and toe side features are different. It should help teach your daughter to cut in toe side as a beginner.
It looks like they make it in a 128 or a 134 so they should have something that works.
Finding a closeout board from last year or 2010 migh be a good option as well. It would be a good way to find something discounted so you don't drop $500+ before you know if she truely gets into the sport.