I have been using a Dust Deputy for several years and I totally agree with your comments about it. I have yet to find anything but a very thin layer of very fine dust inside my vacuum that's almost to little to see, unless I make a streak in it with my finger. No chips or anything larger has ever made it past the Dust Deputy.
My present vacuum system is a re-purposed whole house central vacuum unit with awesome suction. So much so that it imploded my first 5 gallon white bucket within seconds of using it the first time. I learned from the internet that the pickle buckets that are available used from the Firehouse Subs chain sandwich shops were supposed to be a tougher bucket, so I picked up a few of them for $2 each. The money that they get for these buckets is supposed to be donated to the local fire company, so it's kind of a win-win both ways. Well, I managed to implode my first pickle bucket too, but it did take a little longer, before I managed to suck up a planer ship and plug the hoes end.. Then I realized that these buckets were tougher because the top 1/3 of the bucket has ringed ribs around it, but the bottom 2/3 really isn't that much different than the white, gray, or orange buckets. So, to fix my bucket implosion problem I stacked three of these pickle buckets together, giving me 3X the wall thickness and ribs all the way to the bottom of the top most bucket. This worked well and solved my imploding bucket problem, but you first use these buckets they will make your shop smell like dill pickles, until enough air and saw dust goes through them to remove the pickle smell. It was about gone after the first 4 gallons of saw dust was collected and dumped. Not very noticeable after that.
I have since changed to a metal 20 gallon collection barrel under my Dust Deputy and no longer use the pickle buckets. I also now vent my central vacuum unit to the outdoors, so no more dill pickle smells at all for my shop, but stacking these pickle buckets did work well for me. With a Shop Vac it isn't likely that they will need to be stacked, but if you experience a bucket implosion with your Home Depot or Lowes buckets you might want to look into getting one of these tougher buckets from Firehouse Subs. If you experience imploding problems, just use two buckets stacked. Add another if you still have problems. They are tougher than the white, gray, and orange buckets from the Borgs and a pretty good deal at $2 each. I use mine for washing my cars now.
Central North Carolina