Heh . . "best linux distro" is so dependent on the user. Same with desktop environments. It's never a dialog . . it's just opinion and maybe (hopefully) experience.
On a forum . . it's almost always a losing battle.
As far as being safe from all harm . . just because there's too small a target doesn't mean there aren't attack vectors. Also, most user of any linux distro are by default power-users and would protect themselves; the same as a Windows or Mac power-user.
