My friend has the ray 2 and it looks good but almost all of his plants grow in the same shade of green. If you are looking for contrasting colors, the ray 2 might not be the best choice.
If he wanted color contrast, perhaps he should have purchased plants that can be different colors under different conditions? My Ray 2 grows my two different green plants <gasp> TWO different shades of green. And, I know this is mind boggling, but I even have a RED plant in there?!