"I don't pass on an opportunity to badmouth them"
Yeah, we noticed.
I've been using the the DC2000CF (canister filter) for about two years,
and I'm happy with the performance. The limiting factors for DC
performance are impeller size, duct size, and filter type and area. As
long as the motor is powerful enough to turn the impeller at rated
speed, it doesn't matter whether it's 2 HP or 20 HP. The DC2000 has a
12" impeller, and it will perform the same as other machines of
If I were shopping today, I'd take a good look at the Delta 70-560. The
impeller is a bit smaller (11.5"), but it has a larger outlet, which
should equalize things. Comes with a good filter bag, and the price is
under $300 with free shipping from several vendors.