A shop vac is only as good as its filter. Using the wrong one can blow dust back into your air or burn out the motor: The Ultimate Shop-Vac Buying Guide | Blain's Farm & Fleet
The Ultimate Guide to Buying Your First Shop Vac: More Than Just a Workshop Tool buy shop vac
The sweet spot for most homeowners and workshops. They offer enough capacity for significant spills without being impossible to store. A shop vac is only as good as its filter