Much though I'd have loved to give the business to BHM who had been superbly friendly and helpful, it seemed fairer and more sensible to place the order with my local dealer who I'd be expecting to maintain the car, not to mention avoiding all the hassle of importing the car and registering it on french plates.
I took the same approach.
I could have saved a few thousand by buying in the uk and doing the importation/ registration myself, but it would have been a lot of time and hassle, and not the best way to start the relationship with the people you want to service your car.
Interestingly, my price was subject to change (and did) based on the exchange rate fluctuation between deposit and delivery.