Yeah, OE are not failure prone. 12 yrs & 190+ miles on mine.

I have KW Var3 coilover set in the garage, will go in at bag or compressor failure or 200k "all in" suspension/subframe bushing/drivetrain/engine overhaul.

Consider coilovers, if KWs are too pricey, look into BC Racing.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!