Digital BW, The Print

There are alot of choices out there.  I am playing with this right now 
too.  
Just to add one more paper to the mix:  I think Innova Semi Matte is 
one of the most under appreciated papers out there.  It has the d max 
of the gloss papers with less of a glossy finish.  As such, I think 
the deepest shadows are less likely to show a gloss differential.  It 
is not as smooth as the Harman or Innova ultra smooth, so this may be 
an issue for you.  I also think the Harman is a bit sharper and does 
separate shadows a little better.