||made a point of saying the Haltech setup can start to nickel and dime you, just at a higher order of magnitude, as you add features. He runs an AEM unit on his car.
Similar to komplexZTT's post just above, I don't race the car, don't need engine telemetry down to the nth degree - just want to safely have a significant amount of more power. I've started a new tab on my Z spreadsheet to start building up a price comparison. Cost and ease of use will likely be the main drivers.