i have been at this one myself for a few years now .have two dust depudy's set-up on vacuums .they let some buy when there is a lot of debre coming at it .the one hooked to my mitersaw works excellent .i use them for rotortables and small equipment .a good place to start and it will always have a place in your shop .down side is my vacuums are so very loud . i use tool activated festool vacs for sanding . i now have two bag type dust collectors ,bought them used . the tablesaw tends to need more air flow then a vacuum provides .i bought a cyclone on ebay ,have the small one on my 1 1/2hp collector works super well.http://www.ebay.com/itm/Cyclone-Separator-for-Dust-Collector-/270423194251?pt=LH_DefaultDomain_0&hash=item3ef67a7a8b . i have been doing this as i go over the years . kind of need to figure how you work ,what you want to spend .love to hear what works for you