Hey Brian -
Wondering what version of Realflow you are on, and how many nodes you are using for sims? I have only used RF4 and it is limited to two cores (i believe), so my sense of sim speed is perhaps out of date
I ended up going to more of a simple particle and/or sculpting workflow in order to get jobs done at a better pace, but I'm starting to look into RF again and was curious about your experience.
/b