I find a ShopVac may be as expensive as a DC such as a Delta AP400, and most certainly a ShopVac is noisier than a DC. Delta AP400, capable of doing 650 cfm, costs around $150, provides suprisingly strong vacuum suction for any one machine whether it is a table saw, planer, or jointer. The DC is on a wheeled platform, so it is easy to move it around the shop, or to put it away in a corner when you done using it. A more decent dust collector is a Delta 50-760 provides 1200 cfm with 1-micron bag. The machine is powerful enough to do dust collection for 2 machine at the same time and is a long term fit for a home shop. Right now it is on sale with $30 rebate makes it a much better deal over model 50-580. Both DCs use induction motor convertable to 240V, and has 2 year warranty. Both DCs should outlast any ShopVac models, and just in case that you want to resale them, they have decent resale values. I don't have experience on other DC makes, but if they are using induction motor, they should outlast any ShopVac.