The Costco bag fits in the overhead, but lacks external pockets which turned me off to it and also requires a Costco membership which adds to the cost.
DC's work well for a headset or you can do what I did, buy a cheap Telex 750 off eBay and use rubber Howard Leight earplugs. Quiet, light, and cheap.
http://www.ebay.com/itm/Telex-Airman...hWaiVO&vxp=mtr
Howard Leight | SmartFit Earplugs