There is always a lot of debate whether which file manager is the 'best' for the Linux desktop. Some would argue for Dolphin because they are KDE users, or Dolphin because it's KDE but also offers a more simplistic interface, other prefer GNOME and use Nautilus, and still, some will like Krusader because of the many features or PCManFM for it's simplicity, or Midnight Commander due to its TUI interface. So, even though you may have heard this many times before, I'm going to repeat: the best application for a specific user is the one which fits him better and helps him get the work done, in an easy fashion.