There are 3000 Watt Vacs and 3000 Watt Vacs! Just like there are 21" FSC's and 21" FSC's. At the end of the day I believe you get what you pay for! The stated capacities, cfm etc, often don't match actual performance. A bit like comparing a 3.0 Diesel Range Rover against a 3.0 Diesel BMW!
Kev Martin
Marblelife Ltd
Tiling Logistics Ltd