need help!? :) radio that has rear speakers & works with voice enhancement

[Canary Bird]

I am ready to order a Beach 150hp dsg and want a radio that comes with rear speakers and works with the digital voice enhancement. I am trying to buy the most inexpensive radio that allows for these two things and has a MP3 connection (CD would be nice, but not a deal breaker). The VW people here do not know.

Does anyone know which radio model/code comes with rear speakers and works with the digital voice enhancement?

Thanks for your help!