Digital BW, The Print

I'm think of upgrading my 1160 printer that is currently dedicated to
Peizotone inks.  The 1160 works fine, except for clogging from time to
time.  Greater detail and/or larger print szie would be helpful.  I've
noticed that the new R1800 that I got to do color produced sharper,
finer detailed prints than the 1160 -- which is to be expected given
advancing technology, but I didn't think it would be so easily
visible.

I understand that there have been problems/issues/or inconsistencies
with the Peizotone ICC implementation on the Epson 1280 printer.  What
other alternatives are there? How does the 2200 work with Peizotone
inks and ICC's?  Is there going to be something set up for the R1800
(I could always buy another one of these).  Is the old 1520 reliable?
I thought about the Epson 4000, which should give both lager print
size and better resolution.  But the cost of the software to run the
Peizotone inks on it -- about $1800 according to the inkjetmall
website --  doesn't make it a viable choice.  At that price (Printer
and software) you might as well just get a new 4800 or 7800 --
provided Epson new B&W solution for these printers works as well as
they say -- and you can print color a well, without changing inks.

I'm not wedded to the Peizotone ink set either, although I have been
happy with the results it has given me.  How do other inksets, such as
the MIS UT7 compare?  it might even make a Epson 4000 choice do-able.

Does anyone have any thoughts as to what would represent a relaible
step up from a B&W-dedicated Epson 1160 printer ?  Thanks for the
help.