Here’s something to think about – how are you going to listen to your iPod while driving? Seems like an obvious question, but when I got a new SUV over the summer, I suddenly found myself with a problem, because the new truck didn’t have a cassette deck in it.
If you’ve got a cassette deck, you can pretty much use any cassette adapter, although the Griffin SmartDeck will provide some control over the iPod through the head unit’s controls. If you have to use FM modulation, look at the new (bottom mounting) iTrip with the LCD display. I have one of the old-school iTrips, and while the sound quality was good, the old method for tuning the iTrip nearly sent me careening off I-35 on my way down to Austin in March. The new iTrips are much improved.