Hi,
I had the same questions one year ago. I visited some schools in Madrid but decided finally to build up hours in the US and complete the training (modular) in Germany. The good thing in Germany is that if you don't pass all ATPL exams with the first time, you don't have to wait very long for the new examination date (max 3-4 weeks). Another reason are the living costs that you have to consider. If you are living in Berlin you don't have to spent your money for accommodation, there are 4 FTOs near Berlin. If you decide to do a modular fATPL you can still go to Spain and add on the IR or ME, but do your MCC in Germany (2000 EUR).
I hope I could answer some of your questions,
if you need further advice feel free to PM me (in german if you like).
Gruesse,
Alex