It's worth it.
I beat Biohazard twice before anyone in the states could even play it. Plus, you get everything early.
The main reason will appear in a couple of years, near the end of the systems life. With all systems (but Nintendo ones, in particular), almost inevitably an onslaught of amazing games come out in Japan a year before it dies that never see the light of day over here. Remember Saturn? What the Hell were they thinking?!