Well, based on the pictures you have on this site, I think you look fantastic as a brunette. At the same token, I'm sure you will look great as a blond too. If you want somtehing different, then go for the blond look. Have you ever been blond before?
as a hairstylist I just felt I had to comment. I wouldn't go totally blond however...you could totally get away with a ton of warm light brown highlights and a few blond pieces but keep the blond away from our face.your eye color would suit this the best and it would add dimention to your hair. also on a side note getting such a dark color out of your hair will be damaging so I would recommend a treatment for afterwards...hope this helps...post a pic after