I am not sure about your request. Are you looking for a DSM that you can use for quilting? Are you looking for a DSM you can put on a frame, such as the New Joy frame? Or, are you looking for a mid- or long arm quilting machine?
What are your goals and your budget?
I know of a few quilters who had something like the mega quilter set up but then traded up to either a midarm or longarm quilting machine.