Very nice car, a real wolf in sheep's clothing but I have never "got" the Audi thing... a bit grey for me.
My choice was between the XKR or an M5, and having had several BMW's before and having always loved the shape of the XKR, just had to have one. Its a real classic and turns heads *everywhere* you go. I have never had a car that makes strangers come up to you in the street or at petrol stations and say "nice car"!
I would never buy new, I always go for something that has taken the initial depreciation hit and buy a premium model/marque. My last new car was probably in 1996, and since then came out of the company car scheme.
Are you going to get it on the track to learn how to drive it?