AEM will cost you at least six significant digits plus more for the required consulting...
You also mention that you want to handle your graphics. For that you should be looking at DAMs (digital asset management systems) in addition to your CMS.
You first need to clearly establish what you need to do with a CMS, i.e. a list of features, and what specifically are your problems/pain points with what you're currently doing in your workflow, in order to be able to gauge how any tool will help you out.
As Gorly indicates, there are many things to consider. You're kind of saying "I need to get somewhere - what's better: a bicycle, smartcar, Ford, BMW, pickup truck, powerboat, cruise ship, 747?" There are lots of questions that would need to be answered first before any kind of recommendation can even be attempted.
Also keep in mind, like the saying goes, the devil is in the details...