I would recommend going to a show where you could see and test drive all the machines. When I did this I found out that certain ones had terrible vibration, my hands constantly shook. With the sit down ones, you will be moving the entire quilt at times which would be more difficult than just moving an easily moved machine. Also consider the work of pinning the sandwich together/pinning it to a set of rollers. For me it's much easier to pin into the frame rather than using safely pins or basting it on a large table or the floor. I can only be sure of the Gammell but they have a rail with a chair that moves on it in front of the machine available, you said cost is of no concern. That would take care of the sit down issue. These are some things to think about, but I personally would actually see the machines in person before buying one. Also most of the machines are not complicated and most offer classes, CD's for maintainance/problems, as well as excellant over the phone advice so having a dealer next door isn't as necessary as with a DSM. Best wishes in you search and enjoy the new adventure. :)