I just received the Berlin Philharmonic - Claudio Abbado CD. It was recorded in the Salzburger Dome and the acoustics show it. The thought that Mozart probably visited the recording venue during his lifetime is also intriguing. I strongly prefer this version over the Karajan - Wiener Philharmoniker one. The recording is very clear, dynamic and grand. I find it emotionally gripping. Unfortunately, I am not familiar with the Gardiner version. Maybe that's next.