I have "versions of" the Speed Passion in my cars and I can't fault it with modified motors. The boosted profiles are OK too if you like that sort of thing. The Hobbywing version is usually the cheapest version but there are good prices on the SP stuff around too.
Tekin has a reputation for being a bit like a switch, not very smooth. Don't really know anything about the Nosram, perhaps that is a good thing because it means people are just running them without issues!
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