I love magazines, so my list looks like Angie's - I need to change careers in order to justify how much money I spend on them! I, too, like to check out British In Style, even German or another country if I can find it!
"O" sometimes has great personal fashion articles that feature all different kinds of women.
Another one that can actually be fun for watching the trends (whether or not you follow them) is People's Style Watch.
I think Bazaar does a consistently good job of keeping women of all ages in mind. It is one of the few magazines that doesn't lump women over 50 into the same category, which I think is wonderful.
One thing you might want to do is spend some time looking at current issues and the content on the website. Some magazines have a lot of good content on their site, so you might decide to get one that has less online.