The best electronic scale? I am afraid we could never afford those. However for reloading the best scale is the one that you feel comfortable with and can use with out any problems. I think it is safe to say any digital scale over $70 would give you a top quality scale for reloading.
Here is a link to one used and being sold from someone who has reloaded a lot of ammunition.
http://www.brianenos.com/store/be.scale.html
Don't worry so much on what is the best or what is the best for another person. Worry about the one that you can read and understand, because we all have our own prejudice when it comes to a certain product.
I use the smaller Lyman scale.