I'm looking into sit-down long arm machines too but I'm not happy with the stitch regulators I've seen so far.
Are there any sit-down long arm machines that have a stitch regulator that is part of (or bolted onto) the actual machine itself? And not the mouse-like gizmo that has to be attached to the quilt?
Stitch regulation is a BIG part of why I want one of these machines, and after playing with a couple I am convinced I do NOT like the gizmo-attached-to-the-quilt method. If that's the only type of stitch regulation available for sit-down long arms...I don't think I want one!