ESC's for feathers. Personal opinion/experience.
Electronise. Cost , ok. Bang for the buck, ok. Reliability, needs some work. Size, annoying. Control mediocre.
IBC. Cost, painfull. Bang fot the Buck good. Reliability high. Size problematic. Control fine.
Robot Power XXL. Cost, painfull. Bang for the buck, reasonable. Reliability high. Controle Fine
Robot Power Sidewinder. Cost, horrible. Bang for the buck, painfull. Reliability high. Control fine.

Random el cheapo RC model ESC's, waste of money. Smoke generators.

But. Botbitz, 2 Aussie roboteers are reprogramming and adapting brushless speedo's to be used for brushed motors. They get good marks for dependability, speed of service and bang for the Buck
Cheaperthan thisyou won't find atm.
But let me tell now, It's a 1 to 2 chance you'll blow these in any situation close to a real fight.
The 25A version should hold a tad better, but the quality from the supplier was dropping, so they don't have one in this range atm.

The TZ85
got good marks on bang for the buck, reliability and size. Cost is painfull. Same range as the Scorpion XXL. Control. No personal experience, but the drive of Tormenta 2 was good enough to win.