Bert, one scenario I can see that might help mitigate the lower air flow while taking advantage of the lower noise benefits would be to incorporate the unit into the big tool arrangement for shorter pathways to the collector. Many of us tend to put a big cyclone in a sound-reduced closet which generally makes for a longer main run out to the tools. I'm actually giving this some thought as I mentally prepare for a new shop building...do I want to do what I did before with the closet or work out a "cluster" for machining that supports workflow with a collector like the Harvey smack in the middle of it? It really is something to think about and could even impact the size of the building I go with.
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The most expensive tool is the one you buy "cheaply" and often...