Nice looking X! Start by browsing the thread "post pictures of your X5". You will get a ton of ideas. Do searching on this forum from there to dig deeper.

In my opinion a proper set of wheels and tires is the best modification for any car or truck. From there the sky is the limit but beware you will never be satisfied that it is "done".

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2002 X5 4.6is - Titanium Silver / Black Alcantara - Dinan Stage 2 - Bilstein/Eibach - Brembo BBK ----SOLD---
1993 318i - Brilliantrot / Tan - bone stock daily driver