Very few players will sell even from smaller top 5 league clubs to the big boys once they get into their mid twenties. If he want to go to a top team in a top five league this is his last chance.
If they are not knocking down his door now they won't in a year, even if he goes to Celta Vigo and scores 15. I think the likelihood of anyone scoring much more than that for table fodder in a top five league is dreams. Those teams okay too much negative soccer to highlight great attackers.
If we are his best chance at European money he will come here regardless if reputation. In the end the dollars will decide.