Comic Book Talk
There's also digital if that's an option.
Comixology. Great source for digital. And once digital it is always available. Never goes out of "print".
I've gone almost all digital (I just bought The Authority omnibus, so some paper). A good sized tablet is hard to beat as a comic reading media.
On the topic of the demise of comics, I'm honestly more worried about the smaller publishers than DC or Marvel. The little guys are putting out some great stuff these days and are willing to take chances that the Big 2 are not.
Dynamite, Dark Horse, Valiant, Image, IDW, and others all have some really good titles available. I'd hate to lose those guys, but they'll probably be the Canary in the coal mine. When we start seeing those guys fold, DC and Marvel may not be far behind