By now, it's pretty established how much the Beatles mean to me, the music I hold closest.
That being said, Everything being equal, I'm afraid I'd have to put it towards the artist at the very beginning of her career, the anticipation of what she has to offer in the future, combined with amazing talent and personality.
At this point, McCartney's show, although probably well produced, will be all about nostalgia as Paul is not the performer he once was.
I would still very much love to see Paul live, one day, it's just that I feel I would get the most enjoyment out of seeing Haley at the beginning of her career with oh so much potential in her future.
There are tickets available in the nosebleeds of Safeco for under $60, but for a bad view, traffic, maybe another time