the eatsmart scale (amazon search: eatsmart scale) has awesome reviews, and lots of ladies here have it or are waiting for it to arrive
Tanita also gets good reviews, but I have seen some and are pretty expensive. the eatsmart is 30$.
I am currently using my wiifit. it's very accurate and has four sensors, I think my old biggest loser scale only had 2, it was very wonky from the get go.