I'd recommend a sensibly priced Bluetooth capable receiver with a remote.

I singled out Pioneer in this link because their remotes work from about any angle

(compared to Alpine and others that require you to aim straight at the unit), opening up more placement possibilities.

A side benefit to the remote is that your eyes stay on the road.

Here's a good resource. http://www.crutchfield.com/g_300/All-Car...Brand%7cPioneer