Here are the current Novak controllers that we combo with our Ballistic 550 motors on 2S; these are low RDS-on (0.00040 ohms) escs necessary for these motors:

GTB2
Havoc Pro SC
Kinetic Spec
Kinetic 2S

Novak's new ESCs:

...GTB2: new features, on-board programmability (no timing) for spec racing, 3.5T 540 motor limit (99.99)

...Havoc Pro SC: new features, on board programmability, including timing adjustments for SC and off road, 3.5T 540 motor limit (139.99)

...Kinetic Spec: new features, full timing adjustments, PC programmability/updateability (NL)--no CL, 8.5T 540 motor limit (159.99)

...Kinetic 2S: everything, full timing adjustments, PC programmability/upgradeability (NL), CL, 3.5T 540 motor limit (199.99)

* all these ESCs are also compatible with Ballistic 550 motors w/2S.