No matter what machine you get - try to get one that takes usb thumb drives or has a direct connect to a laptop ability. You don't want to mess with the memory cards. You'd have to get the gadget to read/transfer the designs and it's just not worth it.
Try looking at the other Brothers - NOT the one at Walmart that was linked before - for a small amount extra you can get one that has a few more bells and whistles - like the usb.
http://www.allbrands.com/products/abp22854.html
There are other places that sell that model and I'd also check to see what you have locally. There is also the 780 that is reasonably priced as well ;)