I went slaying Niseko pow on a EP Pro with a Jester with 132mm brake mounted at true center, which is about 1.5cm in front of the 'midsole mark'. Loved it. Great in the trees, which is where you should be spending 99% of your time there.
I wouldn't recommend putting them where I did for Japan... I went over the handlebars a few times off drops. Probably bang on the line would have been perfect but I wanted them to be good for other stupid stuff. They're damn near symmetrical anyway.
I'm ~90kg, 177cm, ski like a pansy.
By the way... heading to Japan and using metric units... are you a kiwi or an aussie by any chance?I'm probably heading over again for 2 weeks 04/02-16/02