...As much as one day I will SAS my FJ...I cannot justify spending (I'm guessing if the front axle is 5k, + parts/labor) spending near 10k making a truck that has 44K in it undrivable on the highway. If you're going to thrash a rig that bad with trails that require that kind of suspension, I don't understand why you're driving an '07 model! My two cents...
On that note, I DO plan on acquiring an older 4runner/taco that is already swapped and adding some All Pro goodies!
Again though, I do not see that many FJ owners SASing at this point, though I'm sure there will be a few who do! For those who decide to go ahead with it, AP makes some awesome products, and I'm sure you'll be happy with the performance/durability of their goodies!