I've got a Nexus 6.
I use a magnet vent mount (linky) that I had in my old car. The RS has less options on where to put it, but I found the vent on my left works pretty well. I have to lean a little to the left to the see the whole screen, but I dont need it very often. There are tons of these from different people on amazon, they're all the same and range from $6-$8. the only downside is you need a case to squish the metal plate between it and the phone so that it sticks.