In the states I have a Mytee 1001 Speedster. I have a Shazaam vac booster on top of it, a Cross American Vac Booster in front of it The pump in the Mytee has been upgraded to a 250 PSI unit and of course I have a 2000 Watt heater inside that Speedster.
I see carpet cleaning units as stereo components. No one company is 100% the answer. Together, some can really do it for you.
Oh, and I do use a Rotovac Power Wand