from left to right:
china glaze wagon trail (on my index finger) is a black base color packed with fine gold shimmer, giving the polish an overall olive appearance. it's a well-done polish, but the shimmer is too fine to really appeal to my taste these days.
avon golden twilight (on my middle finger) actually has a very deep blue-purple base (captured well by steph's closet), but it looks pretty much black on my nails. the gold shimmer in golden twilight is chunkier than the shimmer in wagon trail yet doesn't shine through the base color well, giving this polish a muddy appearance. i wish i'd passed on this one!
opi ds mystery (on my ring finger) is my favorite of the bunch. while it's not the deep purple holo i had imagined when i first heard that a purple ds polish was in the works, i still love it. this polish has a base color that's much more strongly purple than golden twilight's (although to be fair, it's still quite close to black) as well as very chunky gold shimmer that stands out nicely. i'll definitely be doing a full notd with this one soon.