My favorite high brow magazine is The New Yorker... I don't love every article, but every few issues is an article that just blows me away. For me, a subscription is indispensable.
My favorite low brow magazine is Entertainment Weekly... it's just amazing to me how good it is. I had lunch with the creator a long time ago, and didn't even realize that he had created EW... good thing too, cuz otherwise I would've just fanboied the whole time about how awesome EW is!
What's your favorite magazine of all time: one high brow, and one low brow?