I ultimately went with Kon-El, as I just ended up using my history with him as the tie-breaker over Kara. I grew up with that character more than I did her, as despite loving the character, I happened to grow up in the "no other Kryptonians" day so grew up with Mae instead. Who I liked in her own right, I just never latched onto her as much because although being new to comes at the time, I still knew enough common Superman lore to know that Supergirl was supposed to be Superman's cousin.