you could even go down to a 147 and you would be fine, but if you would rather go for the 150 than that should be fine aswell. just depends if your more of a jibber or a all mountain guy. as for your jump question it will totally be fine on that size for jumps.
I usually ride a M Jacket, but the large is still a good fit. Run a bit smaller than other jackets of the same size. I got the green and blue, and it is okay. Its longer but not super wide, which is good for slimmer guys. Dont get the green and blue, it gets VERY dirty and its too bright for my liking. very warm but also heavy. dont love the style myself, but still nice quality, no rips or fraying.