Are you definately looking for another 4in1 ESC, or are you willing to consider separate ESC?
Either way if you are after the best performance currently, then looking at ESC's that run the latest BLheli32 firmware is where you want to look.
For separate ESC, if you are looking for the best, then the Wriath32 ones that we sell are hard to beat with BLHeli32 firmware, current sensor. telemetry support and RGB LED. But if you still want BLheli32 performance at a better price point, our recently released Chaos32 ESC are the ones to go for (slight bias with my answer as we sell them , but also not bias as we test lots of things and only sell what we think are good) We are also going to be releasing some Wraith32 4in1 ESC in the next couple weeks as we are still testing one.
However in my opinion BLheli_S ESC running Dshot600 are still excellent, so not sure what ESC you are currently running so let us know so we can suggest something better. Racerstar ESC's are also good to use, they dont technicaly use the best components, but I still think they are good especially considering the price.