I'm not particularly sure about the Europeans, but seeing as the Sephardim had just had a cultural golden age during Islamic period, and that Jewish enclaves tend to be known during this period as being helpful administrators (like in Poland), merchants, and bankers. The two most notable places that they relocated to were the Netherlands and the Ottoman Empire, which both benefited from the influx of Jewish immigrants. Also, I should add that sometime after the fall of the Cordoba Caliph, and the reign of the much more zealous Almoravids over Cordoba, the famous Sephardic Rabbi, Maimonides left Spain and ended up in Egypt, where he became the physician of Saladin, though this is 400 years before the expulsion. I'm using Max Dimont's "Jews, God, and History" as a source - It's definitely a good, detailed read, though it definitely has some clear bias.