Exhibition Fiber printed on my 11880 and 7900 to me is outstanding - I've switched from the RC papers (Luster and Glossy) because finally there is a true paper that delivers as much (and more) in color quality as the RC papers. Very rich colors, beautiful very slightly stipple texture, deep blacks, great ability to show detail. A nice "sheen" without being overly "glossy".
I've been looking for something on rolls for panoramas (EEF only comes in sheets), so I've been testing Ilford Gallarie GFS, the Hahnamulee FAB, and the Harman Gloss FB. The Ilford is nice, but does show a little bit more gloss differential (not any bronzing). Its a little duller surface than the others. The Harman is almost like a ferrotype surface ... very glossy, very smooth, great saturation and deep blacks. The Hahnamulee FineArt Baryta is a very rich feeling paper ... has a little more texture than the Epson, but has a very similar sheen and looks the closest to the EEF. It does come in rolls, so it's probably going to end up my second choice for pano's.
My Exhibition Fiber profile on my 7900 has a total gamut volume of 880,000, and black density of L*4. very black.
One other thing, the Epson Exhibition Fiber is very flat out of the box and it stays flat. No problem with curled edges. The Harman and Hahnamulee both have a little curl at each end and require some attention to avoid jamming or surface damage.