The first setup I had in my JL was a Castle 5700Kv. It was plenty fast. The setup I have in it right now is a HobbyWing 5.5T; on 3S it's borderline uncontrollable.
check here: Ofna JL-10 E
that thread has a lot of useful information on different setup, gearing, etc. Once you decide on the motor/ESC setup - just make sure your temps stay within the normal operating range (as per the Mfg) of your setup. Also, if you decide on a modified motor - stock up on diff gears, thrust bolts, outdrives, etc. My spur is still intact but I have replaced the rear diff multiple times.