Well... I run an Auburn HP L.S. and I absolutely love it! IT'S NOT a Locker, but this unit is damn close. It has taken me all kinds of places and great on the street, although you still have to be carefull when its real slippery cause it will fishtail. It's not cheap, but it won't break an axle either. Didn't ur 8.8 come with a L.S.? What size shafts does it have? The Aussie Locker is pretty inexpensive.
When I first started adding "stuff" to my XJ I wanted Lockers front and back, but was talked out of it and was given the suggestion of running L.S. front and back and I'm very happy I went that way. I have the TrueTrac in the front and... its OK, for the.most part. BUT I'm real happy running L.S.'s in both ends.
Hope this helps...
Tatt