If the stage revolves the whole show, you will get to see a lot of equal time of Adam, Larry and The Edge. Bono (and the party) will be focused towards the hysterical masses in the main part of the GA. Bono will come say hi for a song or two to people in the back, but that'll be all. Don't get me wrong, you'll still see Bono, but his back or side will be to you for 90% of the time. My guess is that if you're back a bit, maybe you won't have to tilt your head way up just to see the screen. I've been to a lot of shows and sometimes you just want to step back and take it all in.
Now of course I may be wrong and it is a tough decision, but if you've got the luxery to wait, then I think you're right in waiting to hear from our European posters to see what the show's really all about.