The entire model range is vastly underrated in my opinion. The only real recurring gripe I have with the series 1 cars is the total absence of any decent oddment storage in the cabin.
Spec this one is producing somewhere around 180bhp we believe (up from the stock 150 courtesy of the boost being turned up a bit, the stock setting is very conservative) which is plenty to make it feel properly rapid for an unassuming looking family car. The real party piece of the Activa of course is the active roll control meaning that you can pull 0.98G when cornering. Combined with brakes which are more than capable of stopping the rotation of the planet this means that on twisty roads quite rapid progress can be made.
Equipment spec was pretty good by mid 90s standards too...power steering, air conditioning, stereo with cassette CD multichanger and aux in with steering wheel controls, leather heated electrically adjustable seats, heated electrically adjustable wing mirrors, front fog lights, electric tilt/slide sunroof, driver's central arm rest, illuminated vanity mirrors in the sun visors, electric windows all round, remote central locking and keypad immobiliser, oil temperature gauge, external thermometer, integrated rear windscreen sun shade. Probably a heap of stuff I've forgotten. Nothing there to really shout about nowadays, but by mid 90s standards there were a lot of toys.
The only glaring omission on the Activa in my view was cruise control which wasn't even an option...though I have a cruise control system in a box in the garage which I will be fitting shortly. This should make motorway driving far less stressful given the tendency of this car's speed to almost silently drift up from 70mph to significantly illegal speeds, which in this day of every other gantry having a camera attached is always a worry.
Even a base spec Xantia in 1.9TD form is a very comfortable way to travel vast distances with ease, though there's no reason not to go looking for one in Executive spec as they're worth next to nothing these days. The V6 I would suggest away from as a daily these days purely because there are an increasing number of model specific parts which are getting hard to find these days.