Thanks gitnoob....luckily the "ring" situation has been taken care of a few years ago - so don't have to worry about those expectations!!! I did think about that though!
If I were you, I'd ignore all of the male input on this thread and wait for some female input.
If she likes jewelry, then a ring box might be a bad idea. Set her expectations for a ring, and she'll go all "WTF is this?! A guitar pick?! Where's my GD ring!?" on you.