the versions on Itunes take between 3:14 and 4:19 with an outlier of the piano version at 6:06.
The organ versions feel a bit fast to me and the piano performance seemed more the tempo I would choose (though a 30 second preview is not enough for a well-considered opionion). The consolatory nature of the text, the suspensions and chromatic harmony suggest something a bit slower, but who am I to disagree with the professionals.
Any views?