Mervillian
Oakley Expert
My head is on the larger side and I have both a Monster Dog and Pit Bull (no Valve though). They are both considered larger frames, but the pit bulls are much taller in the lenses. I personally prefer the look and fit of the Monster Dog, but like the fact that the Pit Bulls have unobtanium earsocks and nose pads (while the Monster Dogs do not). I wouldn't settle for "comfortable enough" if you can find a pair that is comfortable and would use that as the deciding factor.