Update - I'm keeping the Lizzie more or less. Long story short, the new one is on its way to me and looks awesome. I have to say one thing though about the sit down - as long as you enjoy sitting and quilting by moving your quilt around then you'll be happy with quilting on a sit down. If you really really love the loading the frame and moving the machine then you will not be so happy with a sit down machine.
I had gotten the quilt frame so I didn't have to baste quilts - only to find out that I hated loading quilts on to the frame. I now table baste with spray baste and scattered pins around the edges. It doesn't take me long to do it now and I haven't had puckers so I'm a happy camper.
What it boils down to is personal preference on this one - I prefer to sit and move my fabric. Others prefer to stand/stool sit and move the machine.
