Totally upto you, mate. Although, the original colour looks amazing, they did corrode far too easily! Suppose it depends how bad yours are, & how much the flaking/pitting/corroding bugs you!!
If it was me, I'd be inclined to get them re-done/have new ones by the dealer, as I love mint, untouched wheels.
But if you've got some spare cash, then maybe look into paying someone to re-furb your wheels in the closest colour they can to the original chrome??
At one stage, by their previous owner, my wheels were re-furbed in a black/silver colour & but do actually look quite close to the original chrome - Not quite as 'shiny', though.