I did love my Xantia too - when it worked, its great solid car, lovely to drive and frugal on the "go juice" but the electrics in it are terrible, cooling fans had a life of their own, fog lamp earths going, now temp gauge not working, speedo has died and the immobiliser is permanently engaged so the engine wont start.

Reckon the loom is in a right mess. Shame as its been maintained lovingly from a mechanical point of view. I am looking at other motors to potentially replace it, but not seen anything wonderful yet on my local gumtree.
Drove a nice Rover 75 2 litre touring yesterday - lovely opulent cabin and feel to it - very smooth ride but felt like it weighed twice what the Xant does and took an age to get up to speed. Its the BMW unit in these. Also looking at Honda Accord diesel estates and Volvos. A bit suspiscious of the C5 and 407, mainly from the electrics side.
Still have my 206 and 2CV in the PSA camp!!