"As I slipped open the sunshade of my spacesuit, I could see that the sky above was black. The curved white and blue Earth fell away below the horizon. Sailing like Icarus past 70,000 feet, I was now the 11th highest human on Earth. Soaring in a U-2 at the edge of space, this moment was one of the highlights of my life." – amazing... no amount of money could buy an experience like this.
I'd love to go up in a U2. Managed to get within touching distance of one at an airshow in Winnipeg back in 1998, I think it was. Beautiful aircraft!