The best one from the US with hardware in it is Modelers Resource. It also has figures but lots of ships and some interesting dioramas.
www.modelersresource.com
A fanzine out of England is DRONE. You can check them out here
http://www.dronemagftvmc.com/
Kitbuilders used to have a some hardware mixed with the figures. I haven't seen an issue on the shelves recently but did use to get this one
http://www.gremlins.com/kitbuilders/
A very slick mag is AFM (Amazing Figure Modeler). As the name implies, it is more of a figure mag but also have the occasional hardware story.
http://www.amazingmodeler.com/
A couple of great Sci-fi sites on the web are
www.Culttvman.com
www.Starshipmodeler.com
Lots of hardware articles, galleries, etc on these sites.