We recently pruchased a small Soehnle digital scale that works up to 11 pounds. It claims to be accurate to .1 oz. up to 5-1/2 pounds, and to .2 oz. from there to 11 pounds. We haven't tested it rigorously, though.
It has the "tare" function: you push the button to turn it on, then set a container on it and push the button again. It resets to zero, ignoring the weight of the container. You then add an ingredient to the required amount, and press the button again. The scale again resets to zero, and you add the next ingredient to its amount, push the button to zero again, and so forth.
We bought it at www.homeclick.com
for $64. I think it may be more suited to household than professional use.
Incidentally, I recommend that site as a great source for practically everything you might need around the house. We are completlng a HUGE renovation of a condo, and spent several thousand bucks there for everything from ceiling fans, hardware, light fixtures and, yes, the kitchen sink. We even got a supplemental set of Villeroy & Bosch china for a little less than half what our friendly local Bloomingdale's wanted.
We did a LOT of comparison shopping including the Internet, through our contractors, my son's cabinet shop, our architect, and everything else we could think of, and Homeclick frequently came up the best deal. Their service and delivery were quite satisfactory.
And no, I'm not on commission or a stockholder.