I gotta say, I like the ears covered also. To my eye, having the ears revealed makes the hair look slightly more helmet-like. Also, as a fan of fantasy/sci-fi art, and as someone who has sketched numerous young ladies myself, I find that most hairstyles tend to cover the ears naturally anyway. Every time I see pics of elves (or Vulcans) the artists seem to go to pains to show the ears, and it usually strikes me as forced.
So, I vote covered ears.
P.S. Sorry, Vektor
, I posted this from my phone before your post went up, and I guess the magic of phone tech delayed actually getting it up for an hour. Ah well.