Hi Peter
And welcome as well.
I am coming up 1 year as an S type owner (my first Jag) and I absolutely love it! I am presuming should you find one, it will be your first Jaguar? it makes me smile, with pride every time I get in or out of her and always give her a friendly little pat on the dash she has been a bit of a pain, but just like SWMBO, you have to pander to her, and some times get your wallet out!
Mine does not have all the bells and whistles so cant comment on that side of things, your budget will define what you get, but I find the seats comfortable, the ride is quite stiff on mine, so can only imagine the comfort on those cars with softer suspension / larger tyres.
She gets admiring glances, and cars on motorways tend to pull into the middle lane, when they see her approaching in the rear view (I kid you not)
I do very little mileage, so running costs not a problem for me, £60 - ish a month for a full tank, MPG approx. 23.4 my right foot has a mind of its own..
The upshot is would I change her for another car? of course I would, but it would have a growler badge on it somewhere!
Regards
Steve