Arguing about which paintball gun is best is inherently a subjective opinion as it matters about who is using it, how they are using it and what else is going on at the time. Such a discussion is like arguing about which color is best or what flavor of is best. The answer for all of these is that it depends on the subjective preferences of the person experiencing the color or flavor given everything else going on in the world. Paintball guns are the same way: being "best" depends on everything else.
At the end of the day, whichever gun you like best is best for you. You can always debate the merits of guns, and people (including me) will continue to do so ad nauseam, but "which is best?" really should be, "which is best for you?"