We also have 3 Pfaff machines: 2038, 1475, and 1200 (Grand Quilter). When we bought the first one, the IDT was the selling point for us, but after using it for a while, we knew we made a good choice. We are amateurs, but it does make a lot of the things we do easier. When I decided to start "helping" sew, we bought the 1475 used. It had been sold originally at the shop where we bought it, and the owner had traded it in for an upgrade. It works perfectly and I doubt I'll ever wear it out. I think these machines are like cars: if you buy a name brand from a reputable dealer, you will get a good product. Everything else just boils down to personal preference and experience. I hope you enjoy your new machine.
Darren