I currently have CA-Fi DASHLINQ4.
I don't have audio problems. I don't have $2K audio system or anything so it's limited by wattage of the existing speakers anyhow. It's just that it was always slow to begin with. Otherwise I did not have any problems. Everything worked fine. My motivation now is I'm upgrading bunch of things on my car and this slow and recently having GPS issues (after the April GPS bug) unit is the one giving me most grief.
I do not wish to have just AA, the whole point for Android Unit is to get away from hooking up my phone and drain it's battery (via cable or BT) and obviously to have and be able to install any Android app. You can't install Torq for example on your unit.
Anyhow, the options I've listed are newer, faster both spec wise and Android version/build wise.
but of course thanks for your input! always looking for alternatives