I have the KD-8000 described above. The "mode" button on top of the scale allows you to work between metric and U.S. measures with ease. I've had mine for almost two years now and have yet to replace the batteries, and when I do, they're cheap. The scale is durable and very portable(light weight), it even has a hard flip up cover over the key pad to protect it. Best of all, they're about $40.00 from Amazon.
Tom Lehmann/The Dough Doctor