Sorry, but I’ll stick with Parmigiano Reggiano. With my Allegrinie La Poia. And with everything else.

 
“Cello” at CostCo is just a marketing brand (essentially they just slice the wheels and slap some cellophane and a label on it).  They offer a Parmigiano Reggiano, as well as an excellent Grana Padano and a Pecorino Romano.  I used to buy the Reggiano all the time but the Grana is so good now I usually get that.  Retiree’s gotta economize.