Finally got the car sorted out. Picking it up next Saturday.
I bought an ex-stock GTD with 6 miles on the clock.
Salesman was entirely incompetent and didn't know how to sell or what the car had as spec.
I compromised on the spec I wanted - lost DCC, 90% rear tints, deep black instead of carbon grey and have a sun roof and winter pack. I can see me playing the game of turning up the heat in the passenger seat to annoy my wife with that but some heated washer jets on top of it is neither here nor there. Never owned a car with a sun roof and never cared to spec it but it might be pleasant in summer on occasion. Ended up with £5k off list in the end and have not had to wait an eternity for the car.
Dealer didn't expect me to buy a car there and then and was cautious about taking me out for too long a test drive as the car was new.

Thanks for input on the purchase everyone, much appreciated.