I've stayed in 4117 and I can tell you that you can't tell "for sure" whether the view will be obstructed or not, by looking at the deck plan. I'd guess that your cabins stand a pretty good chance of having a relatively unobstructed view, since they are on the end. My cabin, 4117 had a pretty good view, with only a slight obstruction, by the nose of one of the lifeboats. Those are all excellent cabins IMO, and I'd recommend them in a heartbeat!
"SKY"