I like the magnesium metalic. It is also a color on all of the 04 civics, not just the hybrids. You might start seeing more cars on the road that are that color. I have personally seen lots of 04 civics on the road that color. It wouldn't really other me, but if you are going for the color that no one else has, it might not be the best.
I still like it better than the blue. I think the magnesium would look really nice with your amber vision corners.