I have all 3 machines which I carry at all times in the van whilst valeting. I mainly use the numatic for all the hoover and the wet work. Henrys are reasonably good but when push comes to shove so is the numatic so the henry rarely gets used, the 370 gets used the most mainly due to the generator output which is only 4kva, only my oppinion, I rarely buy new gear now and have purchased a fair bit from e-bay. Pays your money takes your chance if the second hand gear is working okay why pay inflated prices plus vat.
Malky