For a modestly priced electric toothbrush that performs perfectly, with all the expected and necessary functions, look no further than the Oral-B Pro 2 2000N Cross Action.
From OnBuy
Oral-B Pro 2 2000W 3D White Electric Rechargeable Toothbrush, Pink with 2 Modes
Robert Dyas
Oral B Oral-B Pro 2 Rechargeable 3DWhite 2000W Electric Toothbrush - Pink