I've done the concorde experience (of sorts). When I was about 3 I was taken by my grandparents on the bird LHR-JFK-LHR. One of my most treasured photos from my childhood is my 3 year-old self posing in front of the Mach sign. I still have the mini silver concorde model in my room from that trip.

In response to your question I doubt I'd could place a limit on the amount of miles I'd be willing to spend on her. She's priceless IMHO ^:-:^:-: