Here are some top electric toothbrushes in USA and UK
http://www.t3.com/features/best-electric-toothbrush-to-buy
http://www.bestsellingreviews.com/Personal-Care/Electric-Toothbrush/
http://www.independent.co.uk/extras/indybest/house-garden/the-10-best-electric-toothbrushes-8564916.html