Entry level Phillips Sonicare electric toothbrush (ie the vibrating type unlike Oral-B's rotational toothbrush heads)
Removes up to 7x more plaque than a manual toothbrush
Helps improve gum health
Helps maintain white teeth
2-week battery life - lasts up to 2 weeks between charges
Currently $70 or more at Shavershop & Harvey Norman.
I use the Diamondclean compact heads with mine and you can buy cheap cases for it on Ebay.
Any cheaper brush heads?