I'd just read the phantom's s3 thread.. which triggers one question:
what anti-theft system do you use? standard audi? immobiliser+alarm? did you find it sufficient?
personally, I use a hidden fuel pump switch + one relatively unknown mechanical system (designed by yugoslavian ex-car theft). with this thing, there are just two ways to have your car stolen:
a) thefts load your car on a SPECIAL truck (which needs alot space and a special truck). they cannot just tow your car away or,
b) they remove the complete system from the car (which takes about 2 hours to the system's fully trained mechanic at standard working conditions - enough light&space + front doors full open + car keys)
the system is that powerful that my insurance company provides me a 15% discount on insurance due to that system fitted into my car.(all proved with certificates)
I saw somewhere a theft strealing Audi (with original factory fitted alarm/immobiliser + retrofitted OEM gear lever lock) in less than 2 minutes! with the system I have, nobody didn't even atempt to steal it. (maybe I was just lucky so far) but anyway I live in very "theft attractive environment" where all VAG cars are in top 10 on the list.
well, it has a negative thing as well. if the thefts doesn't know that system and attempt to steal it.... poor car then!! I saw the police pics of steal attempted car - dashboard completely damaged, steering wheel shaft completely damaged (they used liquid Nitrogen), electronic box damaged.. bloodly hell money to get the things fixed, but the car remained on its place! so it's considerable. rather have your car stolen and get the insurance repaid or have the car protected but possibly have the car badly damaged.
yup, at the end - the complete install was about 200GBP.