here's the deal
and anyone that thinks different is just ignorant
all vacs work well when new ...even the cheapest $39 dollar Bissell
None, regardless of price are worth a chit when overfilled, filters clogged or plugged ports
it comes down to a few things
usable onboard hose attachment
reasonable longevity in a body that will stand reasonable "crew abuse"
Filtration ..not just relative ease of maintenance/clean, but sealed/filtered enough you don't get a ton of dust blown back out into the room*
pret'near every $130-$200 vac accomplishes all that
it's stoopit to spend more
Cause they all look like azz (and soft bag holders smell like it) in a few years anyway .
So instead of replacing the bag or roll brush....buy a shinny brand new one
for $150 bukz, any BD can have "new every YEAR" vac
* filtration....I'm aware some facilities will spec an "honest" accounting of exhaust air filtration.
I know those vacs are more expensive ....you gotta do what you gotta do there
..L.T.A.