Aussie in the rear and ARB up front.
Aussie's are queit, cheap, strong, and easy to install.
ARB's are expensive, strong, and gives you the option to spool or open the front diff. the latter is a real advantage when turning real tight off road. just my opinion


89 K5 Blazer,TBI 350, 700R4, 6" lift, 40" groundhawgs,3/4 ton 14 bolt rear, 3/4 ton 10 bolt front, 4.88:1 Gears