Implications of a Mac

Our company is thinking of purchasing a Mac for design purposes. With this in mind i wondered if anyone could give me some advise surrounding the implications of this:
We have a Netware Networking system, do we need to obtain the ‘Prosoft’ client in order for the Mac to be integrated into our PC network?
Zip drive. Do all Mac come with Zip drives INSTEAD of floppy’s?
If we need to install a floppy, can the disks we use on the Mac, be used in our current PC’s?
How does the OS of the mac (eg OS4)impact with Novell Netware?

Any advise would be gratefully received
Kind Regards
Neil Hughes