Vistek has a 5000 on display in the third floor and Henry's has a boxed 5000 in their showroom.
I'll have an update to my iPF5000 review soon. Bottom line is that it's a superb printer. I've now done something over 700 large prints, have never had a clog, and ink use is very low. Image quality is superb.
I also have been told to expect a firmware update before the end of the year.