Ok, so the best option is the Abarth 180HP upgrade : good increase of power and torque, developed by engineers that made the engine, factory warranty. And a lot of fun
It think it's a good deal, a factory programmed upgrade for the cost of an awful box that modify electronic signal and give "false" informations to ECU.
Ha yes it was 1 year and less than 20'000km IIRC... but it cost nothing to ask.
Even without warranty it is the best tune up you can get : the factory one.