Rhinos only for mud! The tall knobs fold and drag on anything else.
Challenge grifos, FMB SSCs and Dugast typhoons are all good general conditions tubs depending on your budget. I haven’t tried the Specialized tracer but I’m looking to get some this season, meant to work very well apparently, grippy but fast until the courses turn properly muddy. Don’t get terras though, they are rubbish.
Planet X currently have some Schwalbe racing ralph tubs on special which should be good, I am a fan of their clincher version.