Looking to buy S3 in the next month or so, and had planned to get one with the Audi Sat nav and phone prep(armrest). Am now thinking of getting S3 without nav and phone prep and fitting one in after. Can anyone suggest some good sat nav systems that will fit in the S3? Have looked at the Kenwood DNX7200 but not sure whether this will fit(Kenwood 6.95" wide/audi 6" wide??) Also, can anyone recommend any retailers that will sell and fit the system, preferably in the Essex area.