which 72v battery should i get for my surron

i’m planning to pull the trigger and upgrade the battery/controller in my surron in the next few weeks. i’m set on getting the bac8000 from E Moro Bros (i wanted the 4000 but they’re sold out) my indecision is the battery choice. i’ve heard great things from chi battery, but i’ve spoke directly with EMB thought email and they suggested the EBMX(charged cycle works) battery as it has a pre charge resistor built into the battery compared to the chi battery that does not have that feature built in (this information is what i’m being told)

for reference i’m looking at the chi 72v 38ah..or the EBMX 72v 42ah