Aaron, instead of a printer dedicated to "GO" application, why not consider a dedicated B&W piezography MPS (glossy) printer from Jon Cone's InkjetMall? It gives you a bit more flexibility with that printer, so instead of only a "GO printer" you get a great B&W printer with GO and
a "GO printer."
I converted my old 9800 to a B&W K7 Piezography MPS selenium inkset, with GO. It's the second half of the B&W equation that requires the gloss overcoat in a "second printing" that makes these B&W prints really outstanding. A "GO curve" for GO only is applied through QTR. Great B&W prints, just a bit better magic than what I can get out of my 9900. The K7 conversion process can be a bit nerve-wracking, but once converted is outstanding.
Now the interesting part: I can take prints from my 9900----and run them through the 9800 applying only the gloss overcoat
(GO). Yeah, it opens up some possibilities....