Surfing - Longboards??
Depends on how you want to ride it. If you want something with more 'glide' and a noserider - stick with the heaver, wider, single fin longboards (concave in the nose and tail helps). If you want to surf more from the tail, consider slightly narrower...
Bamboo ? How to discern quality ?
Go on line and look up nursery's that specialize in bamboo. There are several species of so called good bamboo (yellow grove and giant Japanese timber) that will grow all over the place if you let it alone. They both tolerate heat and cold.
I need help choosing a longboard!!!???
that is a cheap longboard i have a sector 9, which is the top of the line longboard brand ive also heard good things about gravity boards and landyachtz