I have a Kaaz super q 2 way diff and its pretty obnoxious to drive with.
I would suggest a TRD or TT supra diff.

 

Thanks for the heads up. Im probably going to go with the tt diff

 

You should invest some money into the supra tt auto pumpkin. I have that in my 2JZGTE singled SC300 with R154 and its night and day with the lsd. With open diff its not that controllable but with the LSD its much more fun.