For some god information about HC110 to help you decide go to this site:
That resource recommends HC110 for high contrast negs and XTOL for Normal. Also Dil D (1-39 from syrup) if your development times are under 5min. The site has mixing and dilution charts, history and other usefull info.
I will have to say I have tried Delta 400 in both Rodinal and HC110 as well as XTOL and PMK. I agree with the previous posts that either XTOL or PMK is better overall. In high contrast HC110 holds its own. I would get blown highlights with Rodinal 1-50, but stand development or greater dillutions may work. I am just not a fan of Rodinal in fast films.