Hi Bekka,
I used to read [i][color=orange]Omni[/color][/i] as a child, which was a fabulous magazine for its science (both speculative and current — I suppose it’s more pseudoscience than science), and for its science fiction stories, but, unfortunately, it seems that publication has stopped. http://www.omnimag.com/
I also glance through [i]Popular Science[/i] every now and then, but it’s not really a sci-fi [i]genre[/i] mag, although one might consider the odd [i]wildly[/i] speculative article to be in the realm of science fiction.
If you’re interested in sci-fi film reviews, [i]Cinescape[/i] has a decent reputation I believe: http://www.cinescape.com/