Well I only have one machine, so I guess it'd be my singer. Although I don't think he could get it out easily since it's attached the cabinet (one of those folds down inside thingies) and I haven't the slightest clue how to get it off!
Quilt wise, I think I would save the Mario wall hanging I made for DH for Christmas this year. It took quite a bit, he loves it and everything else I have that is quilted is a few WIPs and such.