For what it is worth...im currently using Losi greys (long ones). They are rock solid, and will never break or bend, but are a
BITCH to adjust
even with grease on the thread.
Ive used blue RPM's and found that they are soft and bendy, they showed signs of my crashes and did not stay straight for long.
The JConcepts ones are really nice although I was plagued with the rear weird shaped ballcups popping off alot for some reason