Obviously Motec offers a better resolution and a few other real cool functions compared to other ECUs.
It really comes down to how much you really want to spend on your car, a Possum Link
ECU, Autronic, ECUTEK , Microtech all could make power it
comes down to the tuner and how well he can tweak your map.
I personally have a Link
ECU, it makes power and its ok on the street bar a few surges every now and again. (Which could be fixed by dumping in more fuel into the map im told)
Hope i've added some fuel to the fire.
Pete.