I have the same scenario, similar stats and riding styles. I'm in North Cal. I recently bought the NS Proto 157 after having the same Burton custom since 2002. I've taken the Proto up once and rode it last year on a demo day at sugar bowl. I'm blown away. Rides great on groomers. Warning though, this is the first board I've ever ridden with a rocker. It takes some getting use, I was on it half a day before feeling really comfortable. As far as progression The flex and pop is a nice surprise in the park. I also like that its a true twin because I can progress with butters and switch more. I haven't used it powder, at high speeds or pipe. Its pretty pricey but I justified that with the 3 year warranty, the durability of NS, and the higher ceiling for progression.