So, yeah, this one is all-killer, no filler.
Unforgettable Fire is perhaps quite arty and European, and Rattle & Hum is perhaps not arty enough and too American -- The Joshua Tree is the perfect balance of those influences that were going through the band at the time.
2. Trip Through Your Wires - 9/10 (by far U2's most unnecessarily reviled track; it's a blast)