Outer Limits 4x4 Board

In my slow search to replace my diffs on my GV and also install an
airlocker I'm currently looking at brands of free wheeling hubs.
Which are the best or best value for money?
Aisin, AVM, Warn? Any others to look out for?
Any good/bad points on them?

AVMs appear to be pretty cheap?


Cheers

I have heard that avm cheap also = quality.

Aisan seem the best that i have seen.

Nic