I wear an HJC ac-x2 chromium helmet during summer ($249.99) and a Beiffe full style helmet during winter months ($65)

for good cheap prices check www.denniskirk.com and click on their outlet store tab and you'll find a huge selection of different styles and brands of helmets at a huge range of prices from $0-600. you can even get name brands like HJC, fox, thor etc at prices that other online stores sell cheap brands.