FANG Europe - Best city for my scenario?

I’m a FB SWE intern. I’m European (non EU). I really like it here in London, especially the city. I was thinking about my next career moves. I’m coming from a not-so-rich European country, so UK salaries are way better than what I was previously used to. I am still working, so I am unsure if I’m going to get a return offer - but I think it’s going well so far. My goal is to maximize savings, and climb the career ladder. I’m in a serious relationship, and I’m planning to start a family in a few years. I see that London, Zurich, Munich, Berlin, Dublin, Amsterdam are popular choices, but what about Scandinavians - Finland, Norway, Sweden, and nearby countries like Estonia and Denmark? What are the tradeoffs? London seems amazing so far. All major companies have offices here, meaning the competition is rising and pontentially the pay is going to get bigger. From what I’ve seen so far, Google Zurich is a popular choice, too. The pay is much higher (according to Glassdoor) than FB, and Zurich seems like an ok place to start a family. I also want to factor in my GF’s job opportunities - she’s in bioinformatics (master student). What do you think? #london #europe #zurich