at your weight both of those would be generally considered to small. i am 148 and looking at a 150-154 for a park board. of course that is a generalisation and you might love riding a 150 but as a general guideline i think for 170 its probably 158ish then + or - about 3cm based on what you want to do. the i dont have any personal experience with the jib pan but i have heard good things about it.
you want a med soft board based on what you are trying to achieve. i dont know what your definition of a "big" jump would be but a total noodle wouldnt be a very fun ride to take off of a >20ft jump. if i were you i would look at a 155-157ish board. maybe a capita stairmaster extreme, or a ns evo or look into arbour boards. also, for jumps dont look at rocker boards. they cause wash out based on my experience.
Last edited by synthetic; 02-15-2010 at 04:34 AM.