Having owned two Jags (xj 4.0 coupe) and 2004 xjr - i'm trying to rationalize going from my bulletproof six naturally aspirated BMW and back to a supercharged v6 xf (2016/17).
The ones I can afford seem to be in 60-80k mile range. I'm not expecting perfection but what are things to be concerned with besides water pumps? Help me or help me from myself, brothers.

 

roadrosen, 60-80K miles is not "high mileage". That is the car barely getting broken in. these motors can easily be expected to make it out to 300K miles. So, take that for what it is worth.

As for problems, I know the one XJ that I got to play with for awhile that had the V6, the only motor issue that it really had was the PCV valves blew out. BUt, this is a cheap fix and takes about 30 minutes to do.