Digital BW, The Print

Greetings. I have just upgraded to a 7800 and have decided to dedicate 
my Epson 4000 to B&W work with a bulk ink delivery system. My research 
suggests that there are just two inksets worth looking at. John Cone's 
and Paul Roark's. If you were in my position, starting from square one, 
what would your advice be as to the advantages and disadvantages of 
each.? Thanks.