I read a recent article which listed their official records sold at 125million, so you were close. I can onyl think of Bon Jovi, as the only band still going, who have sold anywhere near that (*they have sold over 100 million as well) R.E.M haven't sold that much, surprisingly only around 50million albums. Even Duran Duran sold more, with over 70million records sold worldwide.
You could defintiely say that U2 are the biggest and most successful band around at present.