First off, I do happen to work for Crutchfield. We sell what is available, from our vendors. For a radio that looks as inconspicuous as possible, I would look at the Alpine CDE-W235BT. Find it here. For the bluetooth microphone, I recommend installing the head, and trying three locations. 1- on the steering column, directly behind the wheel. 2- top of the A pillar. 3- along the headliner, between the mirror and visor. Tape it to each location, have your wife take it for a drive, calling you each time. Have her get up to highway speeds, since what works in a parking lot may or may not work well on the interstate. Once you have determined what works well, take the time to tuck the wire away. If you prefer a rear USB input (I run my iPod Classic in the glovebox, no one needs to know it's there but me), go to a single DIN unit like the CDE-154BT (here). Those would by far be my top two recommendations.
mistanfo wrote:
First off, I do happen to work for Crutchfield. We sell what is available, from our vendors.
I like the disclaimer. 
I want to give her HD radio as well, especially at that price, but the Alpine does look factory-ish
I know this is a thread hijack and I'm sorry but I think it's sorta pertienent; why the CDE-154 and not the CDE-HD148BT? I know it's more money but only $50 and a lot of features are added with a control layout that looks similar.
In reply to mistanfo:
I bought both of the head units I previously mentioned from Crutchfield. With the JVC, I bought a PAC-11 so I could retain the steering wheel controls and a JVC Sirius tuner. It worked out great for me.
One thing that frustrated me was finding a non-touchscreen double-din unit that has a rear USB input. I found about 2.
I may be changing to a different head unit soon. How about hooking a fellow GRMer out? 
Sorry, missed the HD request. The CDE-HD148BT would indeed be a better unit for that request. Most other additional features are more tweaks in nature, but if you listen to terrestrial broadcasts and have HD available locally, go for it.
