Milk - We bought a 121 Hydroslide from Sports Authority with bindings for $75.00. The bindings aren't the greatest but they are lace-ups and work fine. We went back and forth about what board to get for the girls to learn on. In the end we decided on the Hydroslide because for the amount of time it will be used before they outgrow it the price was right.
Here is a picture of my 8 year old daughter getting up on the board.