Ashley or
Lindsay =
Lindsay, but spely
Lindsey because I dislike
Ashley (any spelling) on a girl.
Lindsey or
Lindsay = as said above,
Lindsey, just because I personally think it looks better.
Sidney or
Lindsay =
Lindsay, I loathe (and I mean LOATHE!)
Sidney on a girl!
Neither, i'm sorry but I feel so strongly about the name on a girl I can't choose between the spellings.
Callie or Cali =
Callie looks more complete imo and so that would be my choice, yes there may also be pronunciation issues with Cali.
Calista nn Cali because I prefer the spelling
Calista.