One of the problems with that style of DC is you are filling the bag/filter with all it collects. This results in less surface area for the filter air to escape from and reduces the CFM performance of the unit as the bag fills. A 2 bag system lets the dust and chips fall into the lower bag leaving the filter bag to filter the air to escape. One of the reasons the canister with pleated filter works even better than a 2 bag system is because the pleated filter has more surface area than a filter bag and allows better airflow.Thanks everyone. I think I Might go with the DustRight.