It occurred to me that I've been holding out on my friends here with my top favorite accessory for our phones. I've been using the iBolt car dock since Christmas and I absolutely love it.
I looked at other docks including the Samsung OEM one, but this one beat them all out for my needs after a lot of research.
Build quality is very sturdy and the phone doesn't vibrate while driving. It's easy to pop the phone into the dock and swing down the arm on top that secures it.
When you dock, you only need to make one connection (micro-USB). On the other end of that cable there's a pigtail, one side is USB (for charging) and the other is 3.5mm audio which works out great for me since my car's head-unit has a 3.5mm audio in. I'm a fan of hard-wired connections when possible (as opposed to Bluetooth) for max sound quality. It's nice not to have to plug anything into the headphone jack to get my audio since it all feeds off the one cable.
When you plug in the micro-USB, it automatically launches the phone into dock-mode. I'm supplementing that with the Car Home Ultra app which gives me a lot of customization in being able to select car-related apps (audio, nav, etc) easily with a large, clear interface.
It has a removable insert which gives you flexibility or to use it with many cases they say up to 2.5mm). I don't believe it will house something as large as an Otter Box Defender (but is said to work with the Commuter) ...but works great with my Body Glove Drop Suit, or I can go naked with the insert.
The camera is exposed and facing the front windshield. I've got an app called DailyRoads Voyager that records silently in the background working as a DVR to record trips. Kind of a cool feature in case some idiot cuts me off and tries to blame me!!!
It's great having the phone in arms-reach at all times, charging, playing music and reading my navigation directions all through my car speakers. Music automatically mutes when nav directions are spoken as well as if you hold the Search button to speak out instructions to your phone.
Most of them are marketed for the S3, but that same model works perfectly with the S2 as well.
I got mine from Amazon for around $35. I believe they retail at $39.99 but you can keep your eyes peeled for better deals on Amazon.
More pics and info are in the link iBolt.co - Stay connected with your world.