I am researching purchasing an electric toothbrush for myself and my husband along with a 12yo and 9yo.

From what I understand I would want to get the Pro 1000 since it has only 20,000 ppm and would be the preferred brush for those with sensitive teeth. Is that correct? I have heard of people switching back to a manual brush after trying an electric brush and finding it to rough on their gums. If 20,000 is for those with sensitive teeth, wouldn't I be better off getting the Pro 1000 rather than the Pro 3000?

Thanks!