+1 for Amsterdam (the Hague, Rotterdam and Utrecht). Rent is getting more expensive, but quality of life is very good, healthcare is 60€/month, top universities at 2000€/yr and overall good job prospects
I'd like to add that I've found the Netherlands to be among the most welcoming countries to expats that I've spent meaningful amounts of time in. I've moved away, but I'll always feel like home there.
Also, at least in the cities, everyone will be fluent in English.
If you pick city other than Amsterdam, or are willing to have a 45 min+ commute, rents should still be reasonable.
