I like shop vac brand due to fact you can use (huge) dust bags in them as opposed to filters, sponges or just the cloth cover over the suction cage. All 3 of those seem to clock too quickly, or let too much dust blow out of the vac. Aftermarket bags are available in bulk on eBay or the likes too which is the way to go. The only problem with the bags is, one shot of liquid and they turn to mush, so you have to be mindful of that.