I think the Monster is close performance wise once the component bugs are worked out. Mine was running really cool and I use a high amp Neu 1512 1.5d on 4s. Mine never got over 150 degrees and that was after the fan broke during a race. I think the case and fan design is a bit weak for racing. I would have gladly paid more for a more durable case. The base of the case should be aluminum so it can be screwed securely to the car or top plate. I would also lose the grill on the top of the case and have the fan screwed directly to the heat sink which is what I am going to do after I get mine back from Castle.