Alpine EX-10 Advanced iPod Controller with Bluetooth
I, too, was disappointed with the Ex-10 when used with the FM modulator.  However, once I was able to connect via the aux input the sound turned out to be great!  My main complaint is with the shuffle feature--it does shuffle, but does it by alphabet (first letter of the song) rather than totally at random, which I would prefer.  But all said, it really is a great device, in my opinion.