I don't like Zoot either. I am also small busted but it feels like the rib cage area is really restricted for me.

Previously, I've used Sugoi and I like those. Usually you have lots of options in terms of mesh backs, liners etc. Some of my friends complain that they aren't supportive enough in the bust. But then, that's one of the many advantages to being small busted.

I have have some other lean mean tri girl friends that are not as muscular as I am that like Oomph.

Bottom line, you gotta be able to tri it on and it has to be snug, like a swim suit or it will stretch out too much when wet.