I am in LOVE with my scale! I bought the Tanita Large Capacity scale. http://www.scalesgalore.com/pbath.htm#hd351
It's a little pricey at $85.00 (it was $75.00 when I bought it), 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 accurately weigh over 300 lbs. It has a 440 capacity.