I will be changing cars soon, so all of the kit has to come out anyway. The replacement is a company car and I'm a bit reluctant to pull it apart to find room for the tuner module and amp.

So I've bought a Dension DH102 which is a single DIN unit with build in tuner and Amp and a plug-in 20Gb HDD unit. It's not an Empeg and the firmware at the moment is not very good, but it has some nice features and I'm hoping that future releases will solve the problems. Above all it is a simple plug-n-play install that can quickly be reversed if necessary.