When I first got one, I thought it was nuts that people were buying travel versions. Seriously, how lazy can you get? Now I am unashamedly one of those people. They do take some getting used to, but are worth it in every way. Your teeth readdy do feel cleaner. For the cost of a single crown, you can have a lifetime supply of electric toothbrushes and replacement heads. Penny wise, IMO.
Another good resource, besides Costco, is Bed Bath & Beyond, purchased with one of their ubiquitous, never-expiring 20% off coupons.
I like the shape of the Sonicare Diamond handle. It's square-ish, so it doesn't roll over when you set it on the counter to put toothpaste on the brush.