While I like Trutracs (especially in front applications), I prefer the ARB because you have the option of turning it off. There are times when having a traction aiding device is actually a hinderance. The added air lines and wiring don't amount to much, and add the capabilities onboard air provides. The main weakness is the blue air line, and that can be beefed up using the HD rubber air lines from ARB or the stainless lines from many sources. The ARB compressor is actually pretty durable, and the wiring has no fancy circuits. A couple switches, a relay or two, and a few wires is all it takes to run the system. All very straightforward. The case itself is pretty much bulletproof, and will last longer than you own the vehicle.
Remember, limited slip means there is no full locking of the axles. By definition there will be some loss of power between the two wheels. Gear driven LSDs require either wheelspeed or brake modulation to lock to their potential, which may not be desirable in some situations.
Research carefully before dropping the coin, as it's not a cheap modification and you don't want to have regrets later.
