Georgia and Holly - not a fan of Georgia, but these sound nice together.
Areta and Alexandra (nn Sandy) - I like these a lot, but I really dislike Sandy. I don't like names (or nns) that are adjectives (sandy, lacey, windy, etc).
Sophie and Claire - very nice; both are classy, although Sophie falls into the "overly-used, super-popular" category.
Kylie, Elise and Jaimee - Triplets or a single & twins? I like Kylie & Elise (love Elise!), but Jaimee is one I've never liked.
Kelly and Aaron - Boys? Kelly is refreshing on a boy, if so. :o) Kelly and Aaron sound nice together, regardless of Kelly's sex.
Megan and Jessica - nice, but over-used names
Terena and Kristy - Terena? Interesting...I like it! Kristy is boring to me.
David and Peter - very Biblical, lol. I like them, though!
Benjamin and Jacqueline (Ben and Jacqui) - Awesome (I'm a sucker for Ben- names).
Elise and Nathan - Another Elise? Wow! :o) I like these, too, although I prefer Nathaniel, nn Nathan.