Would say go with what Alan thinks if he is going to map it. I know he likes the Autronic stuff and is good at mapping it. He is also trying the Colins ecu out on my car and from what he has said thinks its a good bit of kit and is plug and play.
Bonus is if you go for Autronic he will have a good frew maps to work from as it sounds like you will be similar spec to Euan.