(Good reply)

I'd throw in agreement with the IFS being better for high speed work, and the live axles being better for rock crawling...a live axle can articulate in ways that an IFS rig can only dream of...the money it takes to get a IFS to get the same potential wheel travel is insane, and, after al that, it STILL can't outperform a live axle.

You reverse all of the above advantages/disadvantages on a high speed run across Baja, etc...where the IFS follows the terrain better as the one tire's path is not interferring with the other tire's path (Independent suspension)...and the live axle would be juddering all over the place, etc.

A Hummer is not the ultimate off roader..its almost useless on most trails actually due to its bulk...it is well suited for dashing across dunes or similar terrain, and crossing open country, fording, etc...and, if the trail is wide enough, it's twin lockers can get it through some pretty tough obstacles (A front locker helps an IFS rig even ore than it helps a Live axle rig...one tire ends up airborne more often on the IFS...)...

So, an H1 is pretty damn capable, but it is not the ultimate off roader, and the H2 is a somewhat more capable Suburban, etc...

Never saw an H3 in action...at least it looks like it might at least be able to FIT on a trail.