2010 Jaguar XF Supercharged 4dr Sedan (5.0L 8cyl S/C 6A)
Looked at E550, 550i, and M56 before buying the XF. Power is awesome, faster than the factory reported 4.9 to 60. Great design and different from BMW/Merc, really gives a sense of luxury and yet is a total sleeper in performance. My only concern in buying the Jaguar was reliability - no problems to report after a month though so maybe the demons are history. Super smooth ride but also handles well. The hockey puck transmission shifter is really a good idea, takes up a lot less room - why do you need a big stick on an automatic? Navigation and touchscreen are a bit slow and dated, but I don't use them much so not bothersome. No buyers remorse here, I'd buy again and recommend the XF highly.