1. I
LOVE Eve though I'd probably use
Eva because my surname has one syllable (darn it!).
Eve is so simple and straightforward yet elegant; you're right, it does pack a lot of punch into three letters.
2.
My favorite
Eve combo (and I've given this much thought) is
Eve Marielle.
3.
My favorite of your combos is
Eve Teresa. WDYT of
Eve Therese?