Best head unit?

[fantasygoat]

I'm looking for recommendations on a head unit for my car.

I'd like it to have built-in Bluetooth support and a decent interface to control an iPod.

It will be driving an external amp so it doesn't need a built-in amp at all. Line out only.

Sound quality is #1, followed by user interface. The Kenwood I got in my daily driver has all the above but the user interface is so bad it actually pisses me off.

Any recommendations welcome!