I ended up going with Isabelle because I didn't want Annabelle shortened to Anna. Wouldn't have made any difference because I always call her by her full name, her friends call her Bella (yay for Twilight! ). It's not like Anna is a horrible name anyway, it's rather sweet.

I love love love Annabelle and sometimes wish I stuck with it, mainly since Isabelle went and got all trendy

In LONG - I'd say don't worry about either nickname because they are both lovely xoxoxo