People say that the Cimex is awkward in tight places, I disagree.
You just have to learn how to use the machine to it's best capabilities.
I can get, & use, the Cimex in places where I cannot use the Sprayborg,
& would never even try with a rotary machine.
I prefer the Cimex over my Sprayborg because the solution is not atomized into the air for me to ingest, the Cimex is a drip feed onto the pads or brushes.
I also find that I can lower the solution tank to get under desks and go further to the back with the Cimex than I can with the Sprayborg, due to the small, but mounted high, solution bottle on the Sprayborg.
I use more solution with the Cimex (not much more), than I do with the Sprayborg, but I have less re-fill times due to the tank being three times larger.
Time is money, I use the same solution in both machines.
Lowering the height of the machine is so much easier with the Cimex, but if you carry the machine in a low roof vehicle, the Sprayborg has the handle that drops right down.
With my van, I can have the Cimex handle standing upright & wheel it straight into the van.
With the Sprayborg, I have to adjust the handle down lower, wheel it in, then raise the handle again.
Again, basically, using ramps to move either machines is extremely easy & definitely NOT back breaking.
Work smarter, not harder.
If I have areas that are extremely soiled or need to be dry quickly, I use the Cimex followed up by the Sprayborg for more soil removal & drying.
If you only have a Sprayborg, then you would do the same, but with different bonnets.
Basically, it's horses for courses and look after your health.
Re the 175's.......
I would NEVER put a newbie on one of those or you may end up with property damage.
Since giving up my 175's, my back and leg pains have all but gone.
I did use 175, 400 & 1500rpm machines for over 20 years.
I have my own Big Wheels on the Cimex which are pneumatic tired, & find this much easier on both the machine & my body to take up or down stairs.
Being air filled, the tires act as shock absorbers.
This also tends to make it easier for a young bloke like myself who can still take it up four flights of stairs when needed.
On the other hand, my Sprayborg with it's semi-hard tires, tends to jar both the machine & myself, especially if you go a bit fast.
Ultimately, it's up to what YOU find best both for the work you need the machine for, & how it (& the solutions), will treat not only yourself, but also those people nearby.
Shorty, you are not making the decision any easier.... Good post....