Looking great!
Personally I like that graphite or whatever colour it's called. My 16 has it too. Pure black is too dark for rims and makes the tires look always dirty. My general rule is wheels never darker than the rubber.
Maybe I'm just funny that way though
What about some 15/16 Nismo wheels off eBay or something. I'm sure you can find them a ton cheaper than the dealer quoted you. Saw a PW 15 Nismo yesterday with them and it looked hot! Might try to find a set myself.
Edit: Z1 sells the set of 4 for $1750usd, shipping to Canada $100 not sure about Oz
https://www.z1motorsports.com/wheel-...15-p-9226.html