Ok there are like 10 pages of threads about LSDs on this site.
general conclusions, buy a quaife.

I had orginally thought Phantom Grip but I do more autoX style driving than straight line

i can either get the quaife and eat ramen for a few months to get it installed, try the obx one or one from this site http://www.amcparts.net/

on a side note, i talked to Brad at Hahn and they are testing the OBX in their cars right now.

I am interested in the one from amcparts.net, I remember seeing the website in an older thread but no one had ever tried it.

Does anyone have any experience with this LSD, ideas, suggestions etc.

after my horrible 15.1 at 104mph this weekend i would be the guinea pig and try the OBX if i knew their warranty was good.