I order most of my boxerbriefs and other underthings online, but once in while I pick up some CK at the Bay, when they have a sale though
If I find a cute pair, or ones that I know will go over well with the guys, I buy them.
my fav online store is a bit of a fetish site and NSFW but if you like designer underwear, you can get them here at decent shipping prices to Canada.
www.internationaljock.com --warning it's totally gay and has anything from rubber thongs to regular boxerbriefs.