the brother sewing and em combo that has the largest size is the Quattro 6000D with 12 x 8 working field. This is at the high end cost wise.
The Brothers that have a D are liscenced disney designs so you are also paying for that.
I bought the Innovis 4000D about three years just as it was being discontinnued so I got a great deal. have not done any EM as of yet.