as for scuffing: you always should check the compatibility of the media and the printer, hp offers huge variety of media of all kinds which are suitable either for dye-based inks or for pigment inks (some work with both types, sometimes lamination is required/recommended). and yes, there are matte polypropylene media and those are really great, i like them very much, even more than matte photopapers (like hp premium matte photo paper, for example).
back to the original question: hp z2100 is - in my opinion - a great printer, i can agree with that. what has been said about bronzing is ture, though, the same about the issues with getting nice red colour.
i have been using the printer drive for a long time and it does not give bad results - until you have a comparison with some outputs send via well set RIP. the basic solution provided by hp - the driver, the built-in spectro and the hp printing utility - gives you everything you need for printing, calibrating and profiling and you really get fairly good printouts. and you would be able to print the images of the size you asked about, there might, however, be some troubles printing images longer than 1.5 meter (you need to make the right settings in the driver to get it out whole). also, you cannot send to print another file when just printingm so if you need higher productivity, using just the driver would rather bother you. anyway, as i have already said, the driver works fine, it all depends on your needs and you can always get a rip whned there is a need...