Depends what level of sustainability or what your breeding goals might be. If you're interested in meat production, I would encourage you to get a silver based breed of hens so that you can raise a sex-linked cross (in addition to your straight RIRs and straight whatever the female). That way you know the hens from the males at hatch, who to keep or sell as layers, vs. raise up for meat chickens.
Silver Laced Wyandotte would give you Cinnamon Queens, but there are other possibilities such as White Plymouth Rocks, Delawares, etc. or Barred Rocks for a black sex link. You just wouldn't plan to breed the offspring again since they won't breed true.
That said, if you love the breed and have no desire to take on something like that, by all means! Some people just really love the variety, rainbow eggs, or feel the flock is stronger for its diversity (?) but I think it ultimately comes down to personal preference and more specific goals.