I think you're going down the wrong track with such a general question.
Most of the BRCA homologated brushless stuff (and quite a lot that isn't!) is excellent. It depends what you're after.
Are you looking for modified or stock class gear?
I know that LRP (and their Nosram siblings) were first out of the blocks with the new style boosted (dynamic timing advance) speed controllers. Other companies eventually caught up and provided firmware upgradeable models. The early LRP models were left stranded by this lack, so they go pretty cheap - I got the Nosram Spec Racing one off a touring car racer for £40, more than adequate for off-road as it's ability to power motors down to 3.5T is more useful in a buggy than the latest, coolest stock spec firmware.
AFAIK, the latest SXX models now are firmware upgradeable too, so will keep up in the speed control arms race, more of a touring car issue than off-road, though.
Personally, I find the price of the latest LRP models to be a bit steep, but there's no issue of quality.
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