QTR-Quadtone RIP

I'm making my first prints with QTR and now am using the new K7 inks on my R2400. In 
QTR's tutorial there is a setting suggestion given for the Print with Preview dialogue which 
indicates the following settings:

-color handling should be set to "let photoshop determine colors"
-Printer Profile se to QTR - gray matte paper
-rendering intent - Perceptual w/black point checked

Cone editions however indicated these settings for use with QTR and R2400

-Color Handling - Let printer determine colors
-Printer profile : None
-Rendering Intent-??? (Perceptual) , Black point grayed out.

So far I have made a very good print with the Cone recommendations (on Hahnemuhle 
Photo Rag), although I am still unclear if "Perceptual" is the setting they want. Can the 
group offer their experience regarding these PWP settings and also if any use the settings 
recommended by QTR's tutorial instead for this printer and ink combination?

Thanks