It could be done completely in zbrush, if you're used to the new hardsurface tools. You might be interested in Frederik Storm's videos showing how he created the hard-surface portions of his Astronaut. http://www.zbrushcentral.com/showthread.php?t=91611 For the pouches, at least the ones that stick out very far on the…
make as much detail in max as possible, things like zips, hard edges and stuff really can't be well replicated in zbrush I find, you're also less likely to become stuck when sculpting because if you jump into sculpting too soon then you may find that you lack direction or are unsure of the interaction between objects, I…