OK, liking the replies so far, no negative things! Yes full service history and just been serviced too (oil was definitely fresh).
It's funny as I'd never noticed how many 350s were on the road until I started to REALLY want one. I'm coming from a Skoda Octavia VRS and the car is just such a nicer place to be, especially the sound.
It's the higher tax bracket I believe. I used the visible orange bits on the front bumper to identify the newer model, I think I was successful but I thought the car was great so I'm happy whatever it is.