Don't be put off by the whole series vs parallel thing... At the end of the day if you use the enforcer as it should be used you will never need more than 75' of hose, so a series machine has more lift rather than the airflow advantage which works better on longer hose lengths.
I would say having more lift helps to "pull" moisture from a carpet or upholstery...
Enforcer is a great machine for this, as well as the machines from Allltec