I originally bought a Scanguage II from Autozone (about $150) because I wanted a device that would stand-alone, stay in the truck and I could taylor the gages.I just ordered this one: ScanTool.net LLC - OBDLink MX Scan Tool | OBD Interface | App Accelerator - ScanTool.net
Feels like the best combo for me. A little more than I wanted to spend but it is upgradable/expandable. Limited to Bluetooth Android and PC. But that works for me. Bruce warned me that it was not setup for iPhone/iPad, and he was right. Thanks!! The WiFi unit comes out later that addresses that, but I do have an Android Tablet that will work well for the car. The hardwire version was half the money, but was limited and it has, uhhh, wires....
Thanks for the help and suggestions. I'll let you know. Looks like fun.