I lust after just two modern cars: the Aston Martin D89 and the Jaguar XK Coupe. However, I accept that both vehicles are well outside my budget, and even if I could afford them, I'm not sure I'd spend my money to own either one. This week, I spent some time with a third car that tugged at my heart strings, the new Jaguar XF. What's really paining me is that owning (or leasing, anyway) this car is not a completely unrealistic goal.