My only new machine is a Viking Sapphire 875, mostly it gets used for Free motion quilting. It has a lovely 10" throat space. Otherwise I use either a treadle or one of the vintage electric machines.
My treadles are a Pfaff 60, Singers 201K,15-90,66 and 237 zig zag. The electrics are Singer FW,301 and Pfaff 1222E.
Sharon