Specialized Air Force red/black: weighs 270 grams without the visor, it fits my noggin pretty good, it was only 35 Euros (sells for $35 in the US)
The air vents are only so-so, and the inside padding is getting un-glued but I didn't expect much from a helmet in this price range anyway.
Edit: oh, just saw cream.soda's got the same one.