Facing the same problem. The whole US government fear, uncertainty and doubt mess makes me question decisions which probably don't even concern me in the long run.

I guess namecheap is about as popular as it gets and most European sellers like gandi aren't as cheap, but there is no way for me to know whether choosing a US based domain seller could ever have any adverse effects on me as an European, whether it's censorship, laws, transfer problems, ownership problems or anything I can't even think of.