V70 TDI: shock absorbers all around, which one?

Hello municipality! I would like to ask the general question again (even if I have already punched some forum members here), simply because I am still unwise what I should do. Km stand 300,000 or more, no idea, used box stop: Original Volvo dampers built, i.e. front oil, back gas. Or all around Bilstein B4. The box should roll comfortable, the original springs are definitely replaced by new OE, because behind already strongly rusted. h, especially on the increasingly bad inner-city streets, feel more comfortable? Deeper, harder, faster is therefore not my goal! Greetings