in your opinion, what is the best machine on the market for laser hair removal and why?
The one that works best for you.
Actually that is a flippant response but it makes a point. There are a number of different lasers and a number of different scenarios. Hard to answer you question without more information.
For example, a strong argument could be made that the ruby laser, esp the E2000 (I think that is the model name) by Palomar is the best laser. But that is assuming that you don’t mind buying it second hand, you are treating someone with very white skin and shallow hair, and you can keep the machine running (they are very difficult to maintain). But within that criteria there is no system that can beat a ruby and none that is better than the E2000.
please read the FAQs which answers this question extensively. the answer depends on several factors which you didn’t provide.