So one thing that never sat quite right with me, or my jeeps rear end, was the 2.5" teraflex lift springs. The rear always seemed to sit a bit low, even when unloaded. When loaded for a trip, the rear would sag tremendously. Teraflex was nice enough to send me a 1" spacer free of charge after a quick phone call. This held me over for a while. However, the rear stance still bothered me when loaded. Another call to teraflex yielded more fantastic support. Jeremy @ Teraflex offered to upgrade me to the heavier duty outback springs for about half the cost since I was sticking with teraflex. He did recommend the 2 door springs with my current front springs since the 4 door 3" outback springs yield about 3.5 inches of lift. I chose to go with the 4 door specific springs, and in the end I am happy.
Here is a shot of the old 2.5" springs and the 3" heavy duty springs side by side.
During the installation, a friend convinced me to leave the 1" rear spacer in place. This would lift the rear of the JK 4". We decided to do this, and 4" front springs were ordered first thing the following day. Look at that rake!