Hey mate,
Their are a few good ECUs out there, Haltech, Vipec, PFC, motec etc.. (in no particular order) If your tuner is recommending a Adaptronic, best to go with that. No point buying an ECU your tuner is not familiar with.
The Haltech E11v2 have been phased out and has been replaced with the Platinum series.
Cheers,
Johno