get a 60gb japanese ps3
but seriously, I think bluray disks are the same region for America and Japan, so you'll be able to play American ps3 games without any mods or anything.
But I don't trust the software ps2 emu in the newer ps3's so the older ps3's would be better.
I'm only half serious though as it's really quite the hassle to do and costs a lot.
But if you have the time and money, it's an option
How bout a review of the game when you get to play it.