Firstly, I don't go by the in game graphics of Arthas. The definitive look for him and his official look to me is in the CG of WotLK. There his armor is more chrome like in appearance. While there may be a small hint of gold on a few parts, the trim is mostly chrome.
The trim as they have it now is more closer to the cinematic, but it's still to gold to me.
Btw, in response to Gagaliya about the sword, I was a taken aback a slight bit, because I too was thinking it would be metal. But when I think about it, while they could do the sword in metal, it would have pushed the statue to about $379 - $399. This statue was already expensive enough as is.
Lastly, even though the sword is plastic, it is still an incredible sculpt, and as such, it definitely stands out. Like I said in my review of SF, to truly be the centerpiece of any collection (and it should be, its that great!), this needs a good chrome or stark silver like paint up on the trim and other pieces of his armor where the skulls on the shoulderpads and kneepads are.
This is still the best 1/5 I think SS has ever done. But, NO STATUE IS PERFECT! Every statue ever made has flaws or inconsistencies I can identify.