I feel that Low Moisture Cleaning is grossly misunderstood by many in our industry and applaud your decision Paul to expand your equipment arsenal.
I feel that a simple question like which is the best is not necessarily a good place to start. More important will be "What are my needs?"
Do you want equipment to be multi-tasking or dedicated to one role? For example, if you buy a standard 180-230rpm rotary you could use it for pre-spray agitation with a brush or pad, you could use it with a tank for encapsulation/crystalisation/shampoo, with a skimming pad to work in protector prior to grooming, or with cotton bonnets as a drying aid after HWE. You could use, with suitable chemistry, Super-Pad Charly on large areas to agitate pre-spray and clean all over, leaving you to just rinse the traffic lanes with your T/M. You can develop your equipment to use so many different L/M techniques including, of course, generic bonnet cleaning. You will also have a choice of machine size and weight as suits your needs.
With some of the branded Low Moisture Systems, they are typically dedicated to just one purpose. They are typically very good though and produce excellent results. Chemicals tend to be at a premium price but, to be honest, the more expensive chems tend to be better suited to the job in hand and produce quality results at such a productive rate that the cost is outweighed by the extra profit generated:) In large open plan offices you would reasonably expect to be earning £100 to £150 per hour for a team of two. On your own, £100 p/h is the norm on straight forward jobs. The best I have acheived is £264 p/h over 3 hours
For generic bonneting (at a MUCH lower sqM rate) the best I have acheived is £190 p/h over 12 hours.
For myself, I have a branded system and a generic rotary. I wouldn't be without either.
Safe and happy cleaning
Ken