I've bought a couple of kitchen scales, all digital and all made by Salter. They work well. I think most of the brands of scales out today are good.
II just have two thoughts. First, I really like digital scales as opposed to analog. I just think digital scales are more accurate and easier to read.
My other thought is to consider the position of the readout relative to what you're weighing and how readable it is. Maybe an example will help explain what I'm trying to say. One of the scales I bought was completely flat (you can see it at this link at amazon: http://www.amazon.com/Salter-11-Pound-Stainless-Steel-Digital-Kitchen/dp/B0000YWUW2/ref=sr_1_1?ie=UTF8&s=home-garden&qid=1231688813&sr=1-1
). The problem with that is that you can't see the readout if you had an even medium size plate on it because the readout is obscured by the plate. This issue can make it kinda hard to use! I've found scales with the readout position offset in some way, lower than the plane of the scale or off to the side, are easier to use.