I really like Tegan. I think its feminine sounding and I don't think its a passing name. I knew someone in elementary school with the name. The reason I don't like Eden is because it reminds me of the Garden of Eden and for some reason I just think it's weird to name a baby the same name. Just my opinion though.
I know what it's like trying to decide between two names. I'm due any day now and I can't decide between Seveah Rae or Elena Rae. I like them both so much I'm thinking about going with Seveah Elena Rae. : )