I had a Rigid "5HP" with an Oneida dust deputy that lasted me for a good while, and is still fine, and served me well for about 12 years so far.  Still have it. Their "quiet" models aren't bad for the money, and are quieter than the "normal" shop vacs.

I replaced the Rigid last year with an Oneida Dust Cobra.  If you want more than a shop vac, but not a full blown dust collector, it's fantastic.  It's expensive compared to a shop vac, but it fit my needs well and I've been very happy with it.  It's HEPA rated, and takes up less floor space than my rigid+cyclone, and pulls about twice as much air through it.  Excellent upgrade for my CNC router, and for the bandsaw, which were my two primary uses for the shop vac.

Otherwise, I would have gone with a Fein Turbo Hepa, because I wanted something quieter, when I'd be running it for a while with the CNC.  

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