The Stradic FJ specs are all over the place. I would be looking at a 5000 which seems to be the fastest at 104cm per spin. It weighs in at about 1/2 of the 8000s weight. The old 8000FI cranked 107cm so the drop to 4.8:1 on the new model has certainly slowed it down
Another option to consider is the Saltist 4500H. They certainly burn line back it at a fair pace at 113cm each crank