Have to agree with a few others here - the Rattle & Hum version was pretty awesome, but the ones that REALLY hit it right one the nail for me are the Elevation Boston and Elevation Slane versions - Slane edging it because he sang it to the heavens that night for Bob - you could just tell, and that moved me then, and it never fails to move me now.
Really moving stuff.
PS: If anyone happens to have the version of BAD from East Rutherford, April 15th 1985. ('A chilling, riveting 16-minute version. Incredible.' according to djerdap!) then I gotta have it - PURLEEEEZE! Please message me or send a yousendit link to cirtap2000@yahoo.com - I'd really appreciate it.
A bit of light entertainment for you. Here's the version of Bad from Milton Keynes in 1985 where the rain caused the sequencer to break down. To make the file a manageable size, I've cut out some of the long silences and Bono talking to the audience. I've also taken out the version of 'Rain' that they do while they're waiting for things to be repaired (apologies to the purists).
Another vote for the Jan 10, 1990 Rotterdam show. Incredible power, giving it his all for the last lovetown performance. Honestly, anybody who hasn't heard this should find it.
I haven't heard some of the other performances listed here, but will definitely be searching tonight.