I don't know anything about speed and jumps in a 4wd but I don't think I would want the heavy JK landing with a 44" front and a 35"+ tire size. I guess you could build the 44 front up inside and out but for what little more it would end being, go with a 60. You could always take your $6k and find a 60/14 bolt combo, do a little build on them, new brackets, ect and have both axles done. Thoughts? I guess price is dependent on how much you get the axles for and how much you can do on your own