I have worked as a FI for L3 in Portugal 2 years ago, do not recommend !
Egnatia in Greece has a very good reputation, worldwide.
If I were you, I would travel to Greece (before any decisionmaking !) and visit Egnatia in Kavala.
While you are there, I recommend to travel 100 km East to Alexandroupoli, where SKIES AVIATION ACADEMY is located.
I also worked for them, and think they are a very professional ATO.
Good luck !