i ride the madtrix with the system.  i love them and here's the deal.
1. the system binding makes the madtrix little bit on the heavy side.  the good point to this is that it keeps you from going off axis where you have no intentions to.  also, you get more of a 'spin-push' when going over 360 spins.  the down side is that it is heavy to carry with you.
2. one tip is marked Big Mountain and the other Big Air.  now, the tip marked Big Mountain is softer the the tip marked Big Air.  it helps you with carving on normal slopes.  now, when the binding is set to Big Air, now the tail (Big Mountain tip) side is the soft part.  it helps you out alot from landing big airs.  it's softness absorbs the shock and gives you a comfortable landing.  the stiffness in the Big Air tip will give you more of a push when hitting the ramp, thus giving you a more push to the air.  good stuff!
3. system binding.  when it is pointing in the direction of the Big Air tip, it is centered on the ski.  when the binding is facing the direction of Big Mountain tip, the binding is backened a little to the back of the ski center.  very, very effective and good.
4. durability.  yes, the system binding works without hassle.  it's great!  Head says that it is indestructable and i believe so.
oh, btw phattTim, since u and i both use the MadTrix(with the system for me), try turning your one of the madtrix ski binding to the Big Air mode and the other to the Big Mountain mode and compare the binding stance on the skis side by side.  you'll know the difference.
and for my answer to this post, definately the MadTrix with the system binding.  for me, the 1080's have been around too long with the same name. boring... it's a good ski, but there are better skis out there nowadays.
Fear is the mind killer!