If it's the one I think you mean, it's certainly tidy although for me the rarity is in the full leather (leather door cards and top/bottom merino dash) which is what you actually want to swap out? The rest of the spec doesn't seem particularly rare albeit it's still decent, which bit were you attracted to?
To answer your question though, Opal white is hit and miss, many don't like it for obvious reasons but personally I think it's great.
I'd buy some/most of the interior off you if you did buy it though
Also from looking at eBay, the entire dash comes as one I believe (including what you'd describe as upper and lower) only bit that's often separate is the glovebox