I'm not much of a concert-goer. Radiohead is one of the only bands I'd pay huge cash to see live.
Radiohead is the greatest band on the planet...the only band that can knock them off the perch, imo, is Rage Against the Machine.
Coldplay is a great band. I like them. They're on my iPod, near the top of my playlists...
Radiohead is simply on another level, that's all...