What's a good tempo for Bach's Prelude in C minor?

I'd say the speed he was playing it in the video is right. It's supposed to move, but not be gabbled. I'd hardly say that was presto (as it was about 112) - more an allegretto. I play the presto at about 165-170 and the adagio much slower, almost without a feel of pulse and with an improvisatory air to it, and the final allegro a little slower than the beginning.