If I was a less verbose writer, I could sum up the 2013 Jaguar XJ in one word: perfection. But that wouldn't make for much of a review, and after a month with the XJ that Fields Jaguar in Waukesha loaned me, I have so much more to say. I'll start with this: if you're the kind of person who can afford to spend $73,000 on a car, and you require something with four seats, this is the car you should buy. Run, don't walk, to Fields Jaguar and buy it. Now.