In general, you would only need a *PostScript* RIP if you needed to print the (PostScript) output from a page layout or vector graphics program. These programs routinely use things ... like type or corporate logos ... that are vector-based.
If you are printing *only* (photographic) image files, you will probably *never* need PostScript. The only caveat that I can think of is PostScript has some pretty powerful CM capabilities. From reading your postings, it seems that you probably already have a pretty good handle on color management using other software solutions.
IMHO: No,. you most likely do *not* need the PostScript version.
"Bill Hilton" wrote in message
I'm thinking of getting the Colorbyte RIP for an Epson 4000 printer ...
if I'm
only printing bitmapped files (ie, photographs) is there any reason for
me to
get the postscript version instead of settling for the raster version,
which is
about $600 cheaper?
Bill