The most fun, the Ka Sun Collection – Ka with full length Webasto sunroof, not a titchy glass vent in the roof. Bog standard and handled like a go cart.
If nicest in the modern comfy fast sense, then any of the three XFs I had as company cars – previous gen sportbrake, or current 4drs with 3.0l V6s. Very comfy for long journeys, tolerably economic if you didn’t use the loud pedal too much.
Sportbrake was in boring metallic grey. 1st 4dr in Caesium Blue, second metallic red with full black pack. Subtle they were not.