I was in the same position a few weeks ago, contemplated the Performa HMX, but went with some Hobbywing G2s. Hobbwing produces for other manufacturers, too, and know what they are doing. You don't have to worry about reverse polarity (except for the standard capacitator, but rp proof options are available) Their mobile app is the best out there, and while I only was able to bench test so far, this esc feels better than the Muchmore, Tekin and Grauper(=Yokomo/R1Wurks) stuff I had in the last few years. Orca might also been an option, but I don't know anyone who has had one before.