In today's dumbed-down new media era of anti-science and mistrust of experts and scientists, it seems to me that New Scientist has dumbed down so far that they are fast approaching red top status - from the wrong side.
Can't talk about the others (don't read 'em and I gave up on Scientific American decades ago when its gobbledegook quotient hit 100%), but New Scientist has definitely taken a turn for the better since it exited from the Reed Group. Prior to that I was planning to cancel my subscription, but those plans are now on hold pending an ongoing review.