if you want lots of pop, look at boards with wide waists and lots of rocker. I ride the Ronix One 142 and it's got the most pop out of all the boards ive ever rode. Other boards that I've liked are the Slingshot Response, Hyperlite Premier, and the 3DS, I've also rode the Murray but it didn't have near as much vertical pop, it was more of a distance with less pop sort of thing if that makes any sence. I've also heard good things about the Ibex, and the Shane. If you're 5'8/5'9 and going to stay that height, I'd stay with a 137, but if you're still growing for sure go for something in a 142.