Well, a Classic 3 bag is red plaid color, and the newer 1CR bags are golden brown,,,id say the 1CR golden brown bag looks better, on a 1CR or Omega, but just my opinion.
I think the Heritage 2 silver bags look sharp on a Classic 1CR and Omega. Better than a Red Plaid bag does anyway.
I guess just because the red plaid bag really only looks right on a Kirby Classic 3, because its all red.
I see that Kirby also has an all brown or tan bag, with the Kirby Logo in ovals all over it,,,,that looks sharp on a Classic or Omega also.