Im saving up for a drum sander. The super max sanders seem to be very well thought of. Id consider the Jet as well. They are all very close in price. Id probably go with the 18-19 because Ive never regretting bigger tools (see bigger lathe, 18 bandsaw, 52 rip fence) but looking at the SuperMax they do have a newer 16 model with built in digital readout. Its about $200 less than their 19, $300 less if I add the digital readout to the 19 myself.
The bigger one is all cast iron. The smaller is aluminum. Either capacity is probably way more than Ill need.
Is the DRO helpful? Any other points Im missing?