They're all good. There is no such thing as "best". When and if you can afford it then you go shoot each of them, set up identically, and draw your own comparisons.. Everybody has their own desires.

You have to draw up parameters for yourself in what you are looking for. Then keep notes on each of the bows as you shoot them. Don't let advertisements and/or peer pressure guide you. Remember, in a year or two Guardian, Drenalin, and Vectix are going to forgotten names due to advertising of the "latest and greatest".

I can afford any bow I want, but one of my parameters is that the price of most top-o-the-line bows is just short of ludicrous. There are many many bows that can and do shoot just as good as these for several hundred dollars less. But that's me. For $700 or so I'd buy a good rifle that will have some value in a few years.