well both are good ... use ZBrush for modeling and then you can use Blender for the rigging of your models or at least for the grouping if you plan to make standalone models . this sure would be a great combination. Using blender will let you save as it will give you great articulation results. just that Daz Studio will not support such so you would be limited with Poser. with Zbrush you will not be able to get your models articulated , with Blender you will not get as detailed models :)

the better results you wish to have the more Programs or features you will use I can not count anymore on one hand how many I use to get my models done , especially many small applications and well the most Important is the Notepad++ I even use Excel for modeling

Actually it is for every artist totally Individual you grow into it and build up Unique setups for your styles