I doubt you'll regret keeping a couple. If you do though and change your mind you shouldn't have any problem finding them a home. They are docile and great egg layers.
I love my RIRs. They are nosy, bossy and inquisitive. They do the best tricks for grapes, snatching them out of hands that are much too high for the other hens. I think you'll be glad you kept them, they have great personalities and are laying machines.