Yeah I'm 6'0 and 141, and I ride 165 Trouble Makers. Very fun in the park for butters, spins and screwing around. If you're riding powder then go for something longer, but in my opinion, there's no real reason to go super long for park. More tail for big landings I guess, but you should be able to land those on a 165 anyway, haha.
You'd be fine also on anything in the 170 range, but if you can get some sort of crazy deal on 169, definently do it.