What is the fastest charger for an Iphone SE (2nd generation)

I just bought the Iphone SE (2nd generation) and I am looking to what would be best to purchase to convert the old earphones to the new phone or would it better to just buy something new? What is cheaper? Also, I need a fast charger, what watt do you recommend and what charger? what about the IQ wireless chargers, are they good?