I now own 10 pairs of these, and one pair of the boxer briefs. The boxer briefs take me back to my junior high days of wedgies. You will need duct-tape to keeps those things from riding up. However the Anatomica Briefs are the Cat's Meow. Comfy, stay put, no funk, good for multi day use, no chaffing, and the best part; the wife likes them. These are expensive, but if you catch them on sale they are worth the price. They run true to IceBreaker's size chart. I'm a 34" waist, and the Larges are fine.
I've used the IB briefs for running and soccer, and they are quite comfortable, with a great fit and good support. They have a very light feel, so you almost don't know you're wearing them. The seat stays seated, so no wedgies, and the pouch does what it's supposed to (with a slight shift to the left). They sit low on the hips, so if you're in to showing off your underwear logos, these might not be the briefs for you (but the no show logo does avoid having strangers ask questions about your ice pick). If they were a little less expensive, I might even toss out my everyday undies and replace them with these.