Hi Lynn,
Welcome to the boards! Do you have a local dealer that you can see the machines? There is info on the site for the machines including the specs such as hoop size, screen size, etc. Some of the machines have upgrades to make them wireless.
Personally, I would consider the latest model as they generally have the upgraded features already.
There are different promotions and package deals with the different models too.
I have the Dream2 and love it for EMB!
Good luck