Go for standard if you can, all have good views. I am on Aurora now in ocean view as would not use balcony in March to Norway ( minus 9 yesterday!). I have a single balcony in July as that is all they had left. They have steel frames but a glass front. They, oddly, have twin beds which cannot be converted to queens! Select is worth it if not too much more cost. Good luck.
After three consecutive sleepless nights on Iona I went to Reception to see what was going on. Large queue all complaining of the same problem. Did not bother. Luckily rest of cruise was not too noisy. Seems to be a common problem on the two new ships.