Karl
There is no definitive answer to your questions.
Look at your marketplace, the type of textile you will, in the main, be cleaning, the type of soils, frequency of cleans...... and then, as a professional carpet cleaner, decide which is the most appropriate tool/system for that job.
For myself, my number one LM system is Dry Fusion, but, for example, last week I cleaned 250sqM with a generic rotary and a colloidal. I've heard great things about OP machines, but, probably due to lack of machine experience, I just can't get on with them. Then there's the Cimex family, effective with conventional LM process' and, I hear, superb with encapsulation. Then there's the VLM systems such as Host, & Envirodri et al.
If I were to be looking at a branded system again, I would have no problem at all with Dry Fusion. The results, ease of use and earning potential is up there with the best. But it is a dedicated machine and system and perhaps a little too high rpm to be safely used in combination with other systems.
Safe and happy cleaning
The Ken