I had mine painted (G2 Caliper Paint) on my '03. OEM's are / were gray. Held up now for 11 years. I've seen a few vipers that are color-matched and they all look excellent to me--but I'm biased
Powder coating I'm sure more durable and the way to go. I went the less expensive (invasive) route. Lastly, any excuse to post my 20 year pride-n-joy, I can't resist. I will be buried in it before I sell it. 44K miles and counting.