I just ordered for my buddy a Flow Era, he's a little heavier than you. 152 I think I got for him. $209 from Sports Authority. Based on his budget requirements, style of riding, and Nivek's recommendations of the board. He's a beginner that's been riding a 148 then a 154 of two boards that I wouldn't buy for $20 so it'll be a step up regardless.
$240 shipped, worth a look
EDIT: Save up some more money for boots, by the way.