17" 175 with a brush about 2% of the time. Over 100 pounds
Old Host scrubber w/white brushes about 97% of the time. About 40 pounds
$45 Bissell bagless POS about 1% of the time. Don't know the weight on it, but light enough.
I used to use the 175 99% of the time, but getting the Mytee cordless BOSS sprayer changed that (was using a pump up or gravity feeding with the 175). I also didn't have the truckmount then. The 175 is the most aggressive of the three, but not practical for 2 story houses or occupied spaces.
The host digs the most crap out of the carpet, can be used dry to pile lift, used to scrub in prespray, scrub and run encap, or used with dry
compound.
I use the bissell just because I am trying to kill the damned thing (repeated flushings of the motor with water while running have not killed it yet, but the "bearings" on the brush roll make a horrendous noise). I have a Momentum to pre-vac with.