SNELL2005 are good until 2015.
You'll probably want to also make sure it's Snell SA-rated since those are designed for auto racing, not motorcycles. Generally, they're lighter in weight and flame resistant.
Here's what I have:
http://www.pyrotect.com/product.php?...&cat=14&page=1
Here's a whole bunch of other choices though, including some really cheap ones if you're ok with Snell2005 and college logo paint:
http://www.pyrotect.com/home.php?cat...rt_direction=0