Remember, the tag lists are based on appearances, so while the JLA appears in that volume it's not necessarily the next JLA centric volume.

In any case, right now the JLA tag is just a little outdated – the Justice League list is a bit more comprehensive (though neither are finished!)

In general, it's not a bad idea to start with the main titles – if the title of the book includes the character or team name, it's probably a safe bet for the next book in. I'd probably also add mini-series ones like COIE to that main list – but you might not need to pick up volumes that contain one crossover issue.

no problem. Let me know if you need some specific advice about any particular volume.