These are a great value used, especially the coupes. With some sensible modifications they can be excellent cars. I have had little or no maintenance issues with the car over 4 years of ownership. I did lower it, & added an x-pipe exhaust, larger wheels, and a black mesh grill. Of these changes, lowering and the growling exhaust are must do mods which greatly enhance the driving experience. The car looks great even though it is 10 years old and the coupes are relatively uncommon so valets tend to keep the car up front, relegating Mercedes SLs and Porsches to the rear. One great feature is the trunk which holds 2 golf bags plus luggage and the dog fits in the back seat, a highly practical GT.
Power. Ageless style. Sound with x- pipe. Supercharger. Trunk space. Handy back seat. Ride quality. Build quality. The power is endless and it pulls steadily until it hits the speed limiter. Prices of used, low mileage cars are ridiculously low for such a car.
Better suspension (e.g., height adjustable coilovers) More efficient, twin-screw supercharger kit. Better intake and intercooler
This car just wants you to drive it fast. Just a toe on the pedal makes the car jump forward. Putting the petal to the medal awakens the turbo-drive and then you leave that guy that wouldn't let you on the highway in your rearview mirror.
The acceleration and the ageless design and moldline.
Find a way to keep pollen and dust off the car - the paint is like a magnet for dirt.
Jaguar XKRs, particularly the coupes, are truly underappreciated IMHO. Low mileage 2000 XKR coupes now sell for about one-third of their original sticker price making them a truly affordable soon-to-be-classic. These cars have 370 supercharged horses, a silky smooth 5-speed mercedes transmission and are a styling masterpiece. One can easily put 2 bags of golf clubs in the trunk and have plenty of room for luggage in the back seat. And, the ride is completely civilized and quiet (almost too quiet). Reliability doesn't seem to be an issue and extended warranties are available for the risk adverse. The upcoming release of the new down-sized XK series should make these cars an even better value.
A lot of soon-to-be-a classic car for the money. Nearly 400 HP supercharged engine wrapped in a sensuous body with silky smooth manners.
The new one is on the way but they should have made a manual transmission and made it roar a little louder.