I really dont know much about wagons (and nivomats), but on my C70 I am running Tomei RS2 coilovers. They cost about $900 delivered.
I thought they would be very harsh, especially with all the back breaking comments I have read about coilovers, but I was pleasantly surprised by the comfort. The have adjustable dampening, and I have set it to the middle and find that quite a good compromise.
Also, the ride height adjustment was much greater than I expected, from above stock height to so low that you start running into other problems.
In short, I would not hesitate putting them on another car.