I have a spax coil over kit fitted. I like the easy adjustable damper but to me they feel a bit crashy, but then the car is new to me and I haven't adjusted them much yet. I get som rubbing so I will raise them abit and also look at shallower top mounts to give them more room to work in.
If I were buying suspensen parts I wouldn't go for coil overs as I don't need the adjustments, safer to stick with a tested spring and damper setup.
If you search the forum I think there was someone else with spax fitted.