Let me tell you the point of view of an spaniard
If i were you i would go for Adventia
www.adventia.org they have more experience in teaching in English and the Chief Ground Instructor is a Brit. Talk to them. They are the best no doubt
Second choice Airmed they have been teaching in English for a whileand iit is on the coast you guarantee good weather.
Last one Aeromadrid, they just started in English and it will be a while until they have the right team.