In general these all look really, really good on you!
I have a slight preference for #2 over #3 for the 1-piece, just because I love all that draping/detail, and I think the color is a bit better on you.
I have the opposite concern about sizing as most -- I worry about #2 being a bit loose once it hits the water! I feel like a suit should feel pretty snug when dry...does #2 feel that way?
[Yes, I have been the "victim" of baggy butt once (seemingly quality) suits that fit fine-but-not-snug hit the water.]
Re 2-piece: I think it's fine and goddess-y as-is, I just wonder if a slightly different shaped bottom -- suit, not yours -- might be even better.
However, were I you I would probably be VERY over swimsuit shopping so feel free to disregard my suggestion...I am being nitpicky! I think because that is a relatively substantial top (I feel ya there, and it looks great on you) a bottom with a *slightly* higher waist and more fabric would look more balanced.