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Re: best suspension available, for jumping an FJ
For really jumping, your only option was stated above... a long travel (LT) suspension. That'll set you back $5k easy. 2.5" coilovers, bypass shocks, airbumps, limit straps, the whole 9 yards. You do that, and you'll be ready to really jump. Of course for those who really jump and race, they usually consider reinforcing the frame a bit, welding the cab to the frame, and also adding in a internal roll cage. The reason, other than the obvious protection of the passengers, is that extensive jumping and high speed maneuvers can totally jack with your frame and cab. Now, since I assume "price is an issue" does limit you to less than $5k just for the suspension, here's a somewhat reasonable way to do it.
First off, forget OME's if you want to jump. They are great in the rocks and slow offroading, but not really meant to jump or go fast. That's pretty much fact.
What you should do, is go with a good coilover replacement system. The best available for the FJ is the Donahoe system. The front coilovers can take speed and have internal limit straps of sorts, so if you fully extend them in the air, you won't destroy them. Get some nice Deaver coils in the rear, nothing higher than 2.5", and preferably a good shock. Donahoe's rear shock should match the front nicely and isn't as expensive as a full bipass or reservoir shock.
For your setup, it would be beneficial if you crank the front Donahoe coilovers a slight bit up so your front is slighly higher than your rear. Trust me, this is the way to do it for what you hipothetically want to do. I adjusted mine this way, and when I was testing it this weekend, I was comfortably (but scared s---less) going 65mph over whoops/washboards in Ocotillo. When I had them adjusted perfectly even, the rear would be dancing everywhere over the whoops.
There is a lot more things you could do to make things safer and more comfortable, but this would be a good start.
Good luck.
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