I was also looking for boxer briefs and couldn't find them so I just went with boxers (on the poll, not in the store). Boxer briefs are the greatest innovation in men's underwear since the "commando" option. In case someone downvoted you because they don't know what they are: Boxer briefs are like boxers, only tighter and more elastic-y. Advantages over boxers include:

• you can put your pants on without having to pull your underwear back down around your legs
• if you're wearing shorts, the wind won't blow up them and freeze you
• they don't have that big open hole in the front that makes it embarrassing to take your pants off when the doctor is trying to look at your leg
• my wife likes them better

The last reason is why I started wearing them in the first place. They were a Christmas gift from my wife, and I liked them so much that I bought more. It's not like guys have that many underwear options, so it's nice to find something new that actually works.