How about something a little bit newer? A more action based take on the old formula, with plenty of interestingly varied magic and powerful mysterious devices that might have... interesting functions.
http://en.wikipedia.org/wiki/Magical_Gir...
http://en.wikipedia.org/wiki/Magical_Gir...
http://en.wikipedia.org/wiki/Magical_Gir...
Of course, Fate and Nanoha are off limits unless the story takes place during the StrikerS time period.