I bought the Tanita Large Capacity scale. http://www.scalesgalore.com/pbath.htm#hd351
It's a little pricey at $75.00, but it is hands down the very best scale I have ever owned. It stores the reading of your last weigh in and shows it. It will store readings for up to five people. I never get a different reading, at all. For me it was also important that it accuratley weigh over 300 lbs. It has a 440 capacity. At over 300 I really had a hard time finding and scale that would weigh me which allowed me to be in the dark alot.