Vacuum Cleaners Discussions

I plan to re-open my vacuum shop & need to know which shampooers to buy.  Since I hear that Hoover Steam Vac SpinScrub (NOT the Dirt Devil Easy Steamer style) is better than its competitors, I'm not sure whether to get the Classic or Platinum?  I know the Bissell ProHeat & Royal/Dirt Devil are junk & the Rug Doctor doesn't scrub the carpet good enough like the XXX & Hoover do.

Extractor type

1. Hoover Steam Vac SpinScrub w/Clean Surge
2. Hoover Platinum or XXX R/C Steam Vac
3. XXX Duo Power (Hoover Dual V)

Scrubber/polisher type

1. Aerus/Lux Floor Pro
2. Koblenz Cleaning Machine
3. Hoover FloorMAX (or Floor-A-Matic)
4. Oreck Orbiter