I wouldn't limit myself to LRP stuff.
Most of the companies out there do excellent race spec electronics now so it's basically down to personal preference really.
Secondhand off the for sale section here rarely goes wrong and good deals can be had. I would look out for the LRP Sphere TC-Spec or Nosram Matrix ISTC for 4wd and the older seed passion motors in something like a 6.5 or 7.5 turn flavour and you would be pretty much set to win nationals.
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