I'm lucky that I live near several places that offer discounts and I'll admit that the discounts are what 'justified' my membership at first. But after being in AHA for years I wouldn't cancel if I moved away. NHC is great, Zymurgy is great, and I think supporting homebrewing/brewing support and lobbying is great. Actually, my wife and I have a family membership and the extra cost does not earn us any additional discounts.
Also, now you'll have access to years of eZymurgy issues online. I've used this several time to read older articles and find recipes.