With TMY you will probably get the greatest speed/minimum grain size
with Xtol straight or 1+1. D76 would also be a good choice, but you'll
probably lose about 1/3 stop of speed. Michrophen will give the same
speed as Xtol but with coarser grain. I remember reading an article
that said that the results from HC110 were very, very close to a
comparable development with Rodinol. In other words, there's fairly
high accutence but large grain.

-Peter