Hi macgeek
Look, I'll be honest with you ... I don't know anything about those apps ... do you currently have those apps and are using them already on a mac? I think you would be better off seeking answers to your questions at maybe an Adobe forum where folk are more knowledgeable about the system specs needed for what you require.
Adobe Forums
The above link will take you to a page where you will see a pull-down menu where you can select which forum you need ... I checked the options and the only forum I couldn't find were for Cinema 4D & 3D Max ...
The iMac you are considering looks pretty good, but you really need to talk to the pros before you will be able to make an informed decision.
Please let us know how things go for you, macgeek