I like my Lightning, but parts are sometimes a royal pain to find. Mine is a Pro 2, and I can find most parts in the RR version, so if it is the RR you are after, then you should be alright on most parts. Should you need them. I have really only broken mine trying to go for the top speed 40'+ jumps. The swift looks OK, but I don't have a clue about parts availability, and I haven't checked out the new Ofna, nor do I know anything about the worlds II. I do have a friend with a Hyper 7, and it is a nice durable buggy. My vote goes to the Lightning out of the three you listed, with the swift a close second if you can get parts for it.