I think it's Munich. This version of Saturday Night is epic:

https://youtu.be/5wCzfu_tiYg

They also performed mind blowing renditions of Always, STBI and IBTFY there. Jon's voice was amazing (IMO he sang Always even better than he did on the TD tour, going for some extremely high notes before Richie's solo and nailing them perfectly), the set list was spectacular, the atmosphere was great (judging by the recording) and the band was at their peak live. Holy shit, I miss this band...

https://youtu.be/B8KgwPi4N5U

The San Jose show was great, too:

https://youtu.be/ji1Y2QBKZ2o

As well as the Cologne gig:

https://youtu.be/lcaK8-wC3RU

IMO the shows at Giants didn't come anywhere close to this level of greatness. Okay, the band performed the best KTF of all time during the second night, but besides that, something was missing already...

Something that never fully came back.