I just fell in love with Acros too.

I've developed it in Rodinal 1:50 with times between 7.5 minutes and 12 minutes. The 7.5 was a mistake as the backing paper said Neopan 400 and I got confused and thought I'd overexposed Neopan by 2 stops. Both came out nicely though the negatives developed for 7.5 minutes were thin. Beautifully low contrast though.

At 7.5 minutes:

http://www.flickr.com/photos/cannelbrae/6020133484

At 12 minutes:

http://www.flickr.com/photos/cannelbrae/5016808138/

I'm going to try switching from HC110 to XTOL for development of faster films. I'll definitely the pair a shot. What are you running with for dev time/agitation?