do some tests first on single layers of scrap fabric. before you commit to embroidering the quilt sandwich you'll want to know what it's going to look like on the back. some designs are a great subsitute for regular freemotion quilting. some are only pretty on the front.
this is my favorite site for machine embroidery designs especially created for quilting the sandwich. lots to choose from and the prices are rock bottom.
http://www.emblibrary.com/el/Browse....mbs=Emblibrary;Quilts&ShowTop=true