Definitely
Caspian, although it is my top name, so very few (if any) names measure up to it. There's nothing wrong with
Ian, but it's not particularly interesting imo. And like you mentioned, you still get the possibility of
Ian with
Caspian, if you really love both.
Dreaming of...
Pandora Beatrix Clio ✦ Caspian Sherlock Walter ✦ Artemis Saffron Kit ✦ Ptolemy Arthur George
Horatio ✦ Lysander ✦ Nikolai ✦ Zephram ✦ Ambrose ✦ Indigo ✦ Cedric
Evanthe ✦ Morgana ✦ Valkyrie ✦ Ziva ✦ Demelza ✦ Zenobia ✦ Marigold