[W.A.C.]

While I love my Grado SR80i headphones, they have one huge problem. They are not noise cancelling. This is a problem because my concentration issues are massive and it's screwing me over regularly when I go to Smash tournaments. So I was wondering if anyone could recommend quality noise cancelling headphones that cancel out noise extremely well. If Grado made noise cancelling headphones, this would be easy but they don't unfortunately. Regarding the price tag, I don't really want to spend more than $150. Don't really want to buy new headphones at all, but my focusing issues are just absolute garbage and I'm tired of being the asshole that constantly asks people to be quiet when I'm playing a match. -_-