I have the 3.0 D v6 XFS which is a very nice place to be. The engine is powerful and gets decent economy so like most big diesels is a pretty decent compromise. The XFS comes well kitted as standard but mine has a lot ofof the option list dropped on it, but as a minimum I'd be want the drivers display (LCD dash), keyless entry, reverse camera, upgraded 380w+ sound system and 18 way memory seats. They all now come with the larger satnav and its just had and update to enable carplay/android auto.
Actually now having looked again the XF 300 Sport once you add on things like keyless entry and reverse camera is not million miles of the XFS...