Nite Ize Steelie
If you're looking for something small and minimal for your car, consider the Nite Ize Steelie. They're one of the original phone dash mount companies and the first to offer slim, strong, durable magnets.
The Steelie is a small steel ball that magnetically attaches to a tiny little piece that you adhere to the back of your phone. It's small enough to almost look invisible on your dash, instead of a huge arm extending 8-inches into your car.
Plus, the ball moves with the phone if you hit a bump or pothole. So while it's durable, it will have a little "give" if it needs to. We love Nite Ize.