Digital BW, The Print

Hi I am new B9180 owner and new to this group.

I've been real happy with results from the printer in color and I'm 
about to try it with B/W.

I've seen conflicting advice on other boards as to whether best results 
are obtained using "gray inks only" or "composite gray". 

I'll be using Hahnemuhle Photo Rag paper.

Has anyone tried both methods with this printer on similar paper?

I have PrintFix PRO so I have the ability to make a B/W ICC profile 
using QTR-Create-ICC. Has anyone tried this with B9180?

Thanks for the help!

Dave