Digital BW, The Print

If you are printing BO on a matte paper with the 4000 and you want 
to print at 2880 it appears that you have to select a different type 
of paper in order to get 2880 as a resolution because these papers 
highest resolution in the print quality box is 1440.  What would be 
the best alternate?  Perhaps one of the semimatte papers 
(proofing/premium)?  They go up to 2880?

I'm at the beginning of the learning curve with BO having gone to 
Clayton's website and starting to digest the tutorial.  I was very 
impressed with BO at 1440.  When I compare the same image printed on 
the 1160 MIS-VM neutral with what the 4000 can do, I really want to 
get the 4000 fine tuned for B&W.  QTR looks promising too.    

Andrew