I put the Currie chp in about 6 months ago, it works great. I have 5.5 lift with aod and my drive line angles were not acceptable even after shimming the perches. I had the locker all ready so the price wasn't to bad for the case and gears. The hi9 looks and sounds good, plus the price ain't bad for a full set up. I would go with the hi9 just for the added strength, if you really think u need it. But any hi pinion u get will solve the dl angle issue u are having plus it will get that pinion out of the rocks.