My favorite cycling magazine is Procycling. I also like Cycle Sport, though not quite as well. Both of these are magazines about racing, though, so I suspect they might not be what you're looking for.

Bicycling is pretty mediocre. They occasionally run an article that I find interesting or inspiring, but I haven't decided if that makes up for the issues that have no useful content at all. I would like the magazine a lot better if they talked more about riding and less about what to buy. I am currently debating whether or not to renew my subscription.