I once tried Acros at 80 ASA and then developed it in 1+50 Rodinal (I think about 7 1/2 mins, 20°C/68°F).
I quite liked the results - no easily visible grain (yes, it's there with a loupe) at 9,5x12", my standard size.
One hint for the development: since Rodinal seems to put up the contrast, I only turned the tank two times every minute rather sloooowly, which tamed the contrast (together with the slight pull). This gave me some excellent shots, and those which were underexposed still gave good results on about grade 3,5 or 4, which I thought was acceptable.
All in all I quite liked the combo.
Best wishes,
Simon