Since you have Stolen Moment, I'd say skip Soul Serenade. While SM is taupe-y, it is dark and warm, and SS is a dark warm purple, so there's overlap. I'm confused about Plumful being "too violet", since i only know it as a lipstick. Also, do you mean too blue-violet? or too red-violet? If you think it's too blue, then you probably won't be happy with Fathoms Deep since it's in the blue range. But if you think it's too red, you might like Fathoms Deep. And I think you can skip Goddess of the Sea because MAC comes out with that sort of color pretty often. That's one reason why i'm skipping it, i have too many of that sort of color as it is.