My mp3 player is a Creative Zen V Plus 4GBMy car has a stock radio and cassette playerI've noticed I could use an fm transmitter. Or, I could use one of those cassette adapters (cassette with a cable connecting to your mp3 player). Does anyone know which is better?Does anybody know if there are any other options?

Cassette adaptors come in pretty clear. I have an FM transmitter and paid $100 for it but once I moved I haven 't been able to find a station that it will broadcast clearly through. You can also replace your car radio for one with a jack to hook up your MP3. I'm getting one next week as I can't use a cassette in my car.