Thanks! I think I'm going with microphen.. Grain isn't much of a concern to me as I'll only be enlarging up to 11x14 and a little grain never bothered me. I've never used Tmax100 so theres a little anxiety involved with this (there are a couple of shots in there which I REALLY want to see come out nice).
As for dilutions is there any advice? I generally like to stick to 1+1 and get a better milage off of my developer but I'm willing to give up on this idea if it sounds less prudent for any reason.