Got a 3l soot chucker X351 XJ Portfolio and a 2l soot chucker XE in base spec, including a manual gearbox.
Happy with both of them. XE is obviously more fun to drive, although both handle incredibly well.
I did nick one of joshwyatts XF's (X250 model) for a day as well, a lovely car to drive, despite the A/C not working on that example on a really hot day.
I seem to recall the 2.2 diesel isn't that great, both in power and in getting anywhere near its claimed economy - I'm sure that DTM fella will be able to comment more. Not sure when the 2.0l came in on the XF, might have been with X260, which again I'm sure DTM can confirm. The Ingenium 2.0l diesel is a far better option, even more so if its already had its chains replaced - early ones suffer chain failure, maybe due to stupid long oil change intervals?
DIY work on Jags isn't always the easiest due to lack of good information resources - "take it to a dealer" is the common response on many UK based Jag forums. That said, the cars are mostly well enough designed and bolted together in such a way to do most jobs, but just occasionally you have to question WTF that useless idiot Cullum was smoking.
Dealer parts can prove pricey, but shares many service and engine parts with Landrover, who's prices are cheaper (but they are in the process of aligning the partnumbers and prices), plus there are more Landrover part specialists out there.