If you are looking primarily for "removing the dust from the air", I would say it depends on which model has the most CFM capability in addition to the most static pressure.? This determines how well it will pull the dust away for things like your CNC machine and wide-belt sander.
Now, "keeping the dust out of the air" is a completely different topic.? If you have asthma or lungs that are sensitive to fine dust, then the baghouse filters are likely going to be poor solutions.? Nedermen doesn't publish what type of bag filters they use, but bags are usually specified at 30 micron or 5 micron.? Typical cartridge filters are around 2 micron.?? The HEPA style filters from Clearvue and Oneida cyclones are in the .2 to .3 micron range.
-Aaron
