If indeed Legacy Pro is Acros, then there's really no need to go with exotic developers. I use a lot of Acros in medium format and the film is simply gorgeous - one of my favorites. I have developed it with XTOL and D-76 and find nothing lacking in terms of tonality, film speed, or any other criteria you care to mention. The negatives almost print themselves, they are that good. I have not tried Rodinal or any other types of developer, and for some users these developers may give that extra something that they're looking for. But for all around use, these generic, off the shelf developers work great; and by following the manufacturer's recommendations, you'll be very close to hitting a home run the first time at bat.