So ive finished my motor and the only thing I have left to complete my swap is to decide on an ECU. Im going standalone but will be running parallel with the stock IS ecu. My tuner recommended either AEM or Haltech. Ive been searching but looking for people with personal experience with either of the mentioned companies. Pros, cons, certain models to stay away from? I personally was leaning towards a haltech but not a clue as to which one to get. Anyways, any help would be great.