I'm torn between: 2008 Jag XF, Premium luxury, 2.7d, 80k miles @ £12k (FSH) or 2010 Jag XF, Premium Luxury, 3.0d, 100k miles @ £13k (FSH) so a newer car with better engine but more mileage, or the older (cheaper) car with less miles and the poorer engine? Help!