Digital BW, The Print

I am proposing to load PR's Eboni-6 into either an Epson 1400 (currently running Claria) or 
possibly an Epson 2400 ( currently running Ultra Chrome K3 )

Is there any advantage in using the 2400 which is set up for pigment rather than the 1400 
which is set up for dye? (I suspect that there may not be)

I have virgin sets of refillable carts for both printers and it is my intention to fill the 
appropriate set with a suitable fluid for flushing the system before loading the Eboni -6 inks.

I am in the UK and am wondering if there is something such as distilled water & rinse aid that 
I could mix up and use as a flushing fluid.

Any thoughts or recommendations on these two questions gratefully received .

Arthur Krick