The Epson Stylus Pro 9000 was once one of their high end large format printers .. so it should be more than adequate.
We just upgraded to a 9800, however before this our 9000 was being used for all our large format printing, from B&W drawings to glossy photographic panels. It is a little slow, but if you aren't doing big runs it should be fine.
Only issue you might want to consider is there are no Epson drivers available for OS X - you would need to use 3rd party drivers such as the GIMP / Gutenprint drivers and I can't guarantee they will work. The reason we replaced it (aside from speed, its over 7 years old AFAIK) was the Hardware RIP box connecting it to our network died and we (along with Epson) could never get it to work on our OS X network on its own. You may want to see if you can get it working with your machine/network before handing over your spare change
cheers,
Owen Sharp
Design Technology Manager
fjmt | francis-jones morehen thorp
iMac 27" i7 2.93Ghz | 32GB RAM | OS 10.10 | Since AC5