Digital BW, The Print

hello!

I have read about the ImagePrint 4 RIP, and also something 
about the Cone Piezography RIP (for Epson desktop printers), 
that works as a Photoshop plugin and increases the optical 
resolution of an EPSON printer by replacing the EPSON software 
in favor of the Piezography broad-band microweave.

Does the Imageprint 4 RIP also increase the optical resolution, 
or how is this rip compared to the Piezo RIP?
Or what else should make it a better choice?

Can I use the MIS FS and FS-Neutral inks with the standard 
Epson driver, or is a rip needed for best result?

What about the Epson printers. I have both 1160 and 1290, 
which one will give the best BW prints with MIS FS/N inks?

Thanks for any help,
Bjorn