Thinking about buying the Oral B Triumph 9400 Electric Toothbrush and looking for helpful input?

I currently have a Sonicare Elite Toothbrush and am considering upgrading to the Oral B Triumph Professional Care Line, primarily because of the whitening feature, which the Sonicare Elite doesn't have. Does anyone have any experience with the Oral B Triumph Professional Care electric toothbrushes? Does this whitening feature work? How does it work in regard to keeping your gums healthy? (I've found that the Sonicare is great for gums, but not so good for whitening....Sonicare makes a new model now with whitening which is basically 30 additional seconds of running time for the toothbrush after you clean your teeth for two minutes).