My favorite is JC Penneys 'yoke front' boxers- lots of good room, more of an 'old style' but... Get some looks at the gym in them. My dad wore them so maybe there is a nostalgia factor.
Check them out.
JCPenney : Stafford® Yoke Front Boxers - 3 Pack
Check them out.
JCPenney : Stafford® Yoke Front Boxers - 3 Pack