For me, as some may know, is Ilfords Warmtone. I mostly use films developed in Pyrocat then printed on Warmtone.
To me, there is no other combination that gives me what I look for in a print. IMO, Selenium toner is a must with this paper. (Examples attached)

girlz_2_lg.jpg cross_river_september_2010sharp.jpg Mikayla Feb 2012.jpg

Ilfords MG4 is a very fine paper as well, I use sparingly when I am looking for very black blacks & very white whites and as stated earlier, it tones very well.