I'll field this question, if you don't mind lunalovegood.

Stella: lunalovegood is smart enough to be and do whatever she wants to be and do. Anyway, the main deciding factor to which house you get into is the house that you want to be in. Therefore, lunalovegood WILL get into Ravenclaw! AS GOD IS MY WITNESS!

hee hee. Got a little carried away. Sorry

Ravenclaw or bust hey luna!? However, have you given serious thought to Hufflepuff? I can recommend it as a house of choice.