Both publications are worth while and each has information the other doesn't. To my mind, ABJ is more oriented to commercial beekeeping while BC leans more toward the hobbyist. What do you want out of your magazine? (aside from the topics you listed) BC has some in depth articles written by qualified but not well known folks on topics like over wintering, while you will probably recognize the names of the authors in ABJ. Randy Oliver, as an example, appears in ABJ exclusively. (BC or at least Editor Kim Flottum has some sort of relationship with Mother Earth News. At least he is/has been a featured speaker at their fairs - he was in the past heavily involved with EAS)
Consider Bee Craft from Britain, available exclusively electronically here in North America.
Also consider membership in IBRA (International Bee Research Association) and get Bee World and depending how you setup your membership, access to the Journal of Apicultural Research.
I subscribe to all and am behind on my reading.