For just plain brute toughness, it's hard to beat a C hub style front suspension. I don't really keep up with what's available from OFNA, but if they offer a C hub style car, it will be tougher by design than either a pivot ball or kingpin style. That's why the MP 7.5 has stuck with the C hub style for so long, it's harder to break than any other 8th suspension design.