im going to say 183 as they are relatively soft and easy to manage at a longer length. @ 175lbs you should be on a 180+. Mount em forward a bit if your worried about length but you'll be fine.
YES!!!! im almost exactly your size, (a tad smaller), and i ride 183s. get them. you wont regret it. longer is for shure better. they have so little swing weight, its not evcen an issue