Digital BW, The Print

Hello,

I went through the group search but did not really find an answer. I
am thinking about getting a wide format printer this year. Basically
it would be a 7600, however a used 7500 is much less expensive. 

However I wonder how the quality is compared to the 7600. Actually I
use the 2100, and I guess that the 7600 is rather similar to it. Is
there a visible difference in quality tothe 7600? 

Are there other disadvantages of the 7500? Are there good b&w prints
to be made with the Bowhaus or QTR RIP and the Epson original inks or
would I have to install quad black inks?

Thank you,

Bernie