The Braun Oral-B 3D Excel Pulsating Toothbrush is probably the one of the best electric toothbrushes that is on the market at the moment. At around £65 (I think you might be able to get it from Argos for a little bit cheaper!) it is at the top end of the range, but being one of the better toothbrushes around it is worth it.
Electric toothbrushes all significantly remove more plaque than normal brushing (but if you’re lazy it doesn’t do it for you!!!). With the Braun Oral-B 3D you get two colour indicating brush heads (both interspaced to clean on and around the teeth) that after 3-4 months will fade to indicate you need to change your brush head. Each head has a different coloured ring on it (so for example the brush can be used by a couple – each having a different coloured brush head). It has two speeds and a pressure sensor to stop you damaging your gums.
It also has a non-slip grip on the base, timer, carry case and a charger.