My dad and I are putting an ARB in the front his IFS differntial, which will add some strength over the stock carrier for sure.  Eventually, we are thinking of upgrading his front IFS suspension with a Blazeland.us longtravel kit, which uses longer T-100 half shafts and wides the from WMS to approx. 65"; it's cheaper and similar to the old Total Chaos kit that used aftermarket torsion bars.  I started out wheeling a heavy 3rd gen. 22RE Auto 4Runner, which I liked a whole bunch.  I think your going to like yours, and anyway why not take yours to the limits statring now and then consider upgrades if the IFS stops working for you?