As others have suggested, Tekin's stuff is good, more expensive though than hobbywing or Speed Passions 1/8 ESC but you do get better customer service and warranty.

I think it comes down to how much you value on the warranty versus price. That is part of the reason initially I went with a Speed Passion Silver Arrow 2. Very good ESC for 1/8 buggy and at the time were about $75 each. Considering the cost of an out of warranty replacement for tekin was more than buying a new Silver Arrow, I kept with that till Viper VTX8s went on sale at amain.

I have been pleasantly surprised with the build quality, features, and service from Viper enough that I bought some more VTX8s, sold my SAV2. For the money, I feel you get a lot of ESC from Viper and you have a long warranty, 6 months. I also like the fact the ESC can be had with a hand held programmer and allows saving of setting profiles.

As it sits now, if I was considering Tekin's RX8 Gen2, I would also consider Vipers VTX8 and compare specs and go with what fits your budget and needs best. I think you can't go wrong with either ESC.