Try Dennis Kirk online as well....you can at least get some prices and have a measuring stick. I recently bought some helmets for the grandkids at Christmas and got some great deals at closeout from them.
Thanks for all the postings - some great sites. I think I'm now leaning toward the AMS Swampfox ones or the Carlisle 489s. They're pretty close in price. Most of my riding is through the fields but after big rains there's always some mud to deal with.