I think that hairdo sounds like a fantastic idea for you~
Also, it's not like it's a haircut that's absolutely, positively reserved only for boys (in fact, most guy haircuts could potentially work on a woman without getting too many weird looks, just as most guy clothes could), so I wouldn't worry too much about people's reactions. Also, if you're really worried about potential gossip, you can probably divert the possibility by making an offhanded, witty comment about how you knew you wanted a haircut like this, but the best example you could find online ended up being modeled by a guy-- whoops! At which point any laughter that may entail will be with you, not at you.