Hi Dave, Thanks for getting back to me, your explanation helps a lot. I have the business cd radio set up so it sounds like an no brainer. I have a professional installer looking at which unit he believes is best at the moment, so I'll wait to see what he' says before making a final decision. HK radio stations are mainly broadcast in Cantonese and the English ones are not worth the effort, so radio isn't a big deal for me. Main functions I'm looking for are the blue tooth for the phone, Playing songs via the iPod, SatNav, and would be good if I could get an app loaded on for playing UK digital radio. Sounds like these units fullfill these basic wants, so I'll give one of them a go. Thanks again...