I use Dash Command and I like it alot. Here's a screen shot of the MINI dash they offer (not connected in pic):
I also use Dashcommand with an iPhone. The display that I made is all numbers so that it is really easy to read.
Almost gone down this road a few times....keep jumping back and forth between a wired unit, and the phone ones.... My thoughts.... The WiFi adapters are worth the extra money if you ever use Bluetooth in your car....keeps that option open....since Bluetooth profiles tend to usually only one paired item.... sometimes you can have more than one, but issues can crop up.. wifi should be plug and play....and still let's you use Bluetooth to connect with your car/and or earpiece.