Hi all, I'm after an FM transmitter for my car. Preferably one that charges my iPhone 4 from cigarette lighter and is good sound quality. I have several different types that i used with ipod touch but they won't charge my iphone when plugged in. I just get a screen telling me charging is not supported. I have some cheap ebay ones that will charge it but are poor sound quality. Anyone had any experience with some yet that they can recommend?