After receiving delivery on 12-12-12, it became immediately apparent that a high-end radar solution is a must for the S. I'm debating between a Passport 8500ci and 9500ci, along with several other possibilities. I visited 'Luxury Details', one of the few installers of radar on high performance cars in the area. The 8500 would run about $1,600 installed, and the 9500 $2,500-$3,000. The latter seems a bit much for the incremental differences (basically rear phase shifters, and a bit more range). Also, i'm hugely concerned about leaving the car with them - even though they had several performance cars on their lot - and about them working on a Tesla. Does anyone know if the Service Center would install one of these kits and have the experience to do it right? What are you all doing about radar solutions? Thanks.