I have the Miele now, and see that Kenmore was top rated by Consumer Reports.
Have used Kenmore for years, also based on C/R ratings. Mine is a cannister; works well on dog fur. As I recall, Miele's biggest problem was initial cost, so if it's working ok, stick with it, but if you NEED to replace it, go with Kenmore. (My sister-in-law, whose kids have asthma, also swears by Kenmore.)