For mild high speed go with Donahoe extended coilovers and Total Chaos UCA's, otherwise if you really want to hit the bumps LT is the only way to fly....... My rig is a compromise, so I can play on the rocks and go fast, in both cases it's a nice smooth ride, would never think of SASing.
BTW I will eventually build a buggy for the really tough stuff, almost have everything I need to start.
