Replace Stereo in 2001 Boxster
 

I have a 2001 Boxster with factory upgraded sound system. Can anyone from Australia tell me if they have replaced the OEM unit with a double din unit featuring GPS, Bluetooth etc.
Or can anyone recommend a decent unit that fits the car?

Try searching forum, lots of info on double din. Basically you need to purchase a double din install kit, which should include stiff to relocate ac controls to lower console.