I recieved my Xtrememac incharge BT for use in the car. It's $80 but found it for $18 from nothingbutsoftware.com, strange I couldn't complete the purchase on my iPad. I'm glad it wouldn't let me cause it was $30 on the iPad but then when I shared the URL to my Nexus the price was $18. I purchased it for $18 and recieved it today. The audio quality is amazing! Even better than using 3.5mm jack from phone to aux in! I am using Volume+ but have the same settings for both wired headset and bt. I couldn't be happier with my purchase so I thought I would share. You just plug into the car charger and 3.5 jack into aux in, pair, and your done. No cables to phone and no call quality is great. The aux in part functions as a mic and button to answer/end calls. And the car charger part has a USB port for charging phone, it comes with an iPhone/iPad charger but you can plug in any USB cable for charge. Let me know if you have any questions. Hope someone else enjoys this as much as me.
Here are some pics. Disregard how messy my car is, I didn't have time to clean, vacuum, armor-all and such. I dont have time for much of anything these days cause I work in a tax office and I'm sure you know what that means this time of year. Hell I shouldn't even have time to occupy these forums but what can I say - my hobby. I took these just now spur of the moment to clear up any confusion. Also I took the picks with my GN, of course.
And just for kicks, here are some NFC tags. The left one toggles BT. The right one toggles from Auto-brightness to Brightness value 0 (completely dim - I hate bright screens). The reason these are not combined into one tag is because at night I dont need to toggle brightness.