Read all three. I would like to see Ringworld and Rendezvous With Rama made into movies. I feel Lucifer’s Hammer has already been done, with the movies Armageddon and Deep Impact.
I would like to see Ringworld done as a series on a streaming service. There is enough there to keep several seasons going and with CGI it could look great. The Kzinti would look amazing and Teela could be the “strong female character” required on all shows. Nessus would no longer be a challenge to make look believable.