You don't need to spend a fortune to upgrade to a Sonicare toothbrush. This one's only $30 (down from $40), and with 31,000 pulses per minute, it cleans just as well as the expensive models. It doesn't have Bluetooth or a travel case, and it only comes with a basic brush head, but it's compatible with any of Sonicare's higher end snap-on brushheads, so you can upgrade it whenever you want.

Philips Sonicare DailyClean Toothbrush | $30 | Normally $40