Digital BW, The Print

I want to reliably and with repeatability create exhibition quality gallery b&w prints. It 
would be nice to do some color as well, but it is not my priority. After further research, I 
feel my choices are:

A) buy used (mint) 4000 and use epson uc inks
B) buy used (mint) 4000 and use third party inks (indicate which)
C) wait and buy the new 4800 in june and use the new UC K3 inks
D) none of the above

what do you all think?