Oh, gosh, I don't know, probably the Heifetz on RCA Living Stereo, just because Heifetz. I tend more towards listening to all sorts of renditions rather than trying to pick a favourite. I just rule out bad renditions (which is rare, I tend to like whichever one I'm listening to at the moment). I've probably listened to the Midori more than any other, because I picked it up early in my SACD collecting.
The winner is me.