Here is some reference stuff I dug up on google. There is a ton out there so keep looking if these do not answer your questions.
1.) Video review of Dolly Plus Brown http://www.youtube.com/watch?v=Ukbit5sSES0
2.) The Avatar lenses will look pretty much like that because it is an opaque lens and will cover any eye color (I would not personally pick these lenses, here is an IRL pic someone shared
3.) I would not personally pick the plain yellow lens either here is a sample pic
4.) Geo lenses tend to blend with your natural eye color to create the effect. As such, any lens from the WonderEye series I have tried looked quite different from their stock images. In this case, brown actually looks more brown than gold to me. Here is someone's pics of their lenses
5.) Dolly Eye Brown are noticeable and pretty bold. Not a good choice if you want a natural pattern but these get noticed. Here is my photo review of them
6.) You did not mention this style, but Princess Pinky Twilight Brown lenses are also a good choice
for noticeably gold eyes with a slightly more intricate pattern than the Dolly Eye Brown lenses.
Between Dolly Plus and Dolly Eye, it depends on whether you want a bigger pupil hole or not. They will deliver the same color. The Avatar and plain yellow lenses do not have a limbal ring [which helps set the iris apart from the rest of your eye] so the yellow loses emphasis. Personally, I would pick one of the Dolly styles you chose or Princess Pinky lenses because they will not look so weird but maybe the character needs to look strange?