Hi Lift
I have used a 48" hi-lift with my 'Cruiser for 15 years. With lifts from 2" to 5", tires from 31" to 35", and it always has allowed me enough lift to change a tire or to pitch rocks under a tire.
It gets darn wobbly near the top of the available travel, and I think you would need a steadying hand or two if you wished to use the longer stroke capability of the 60" jack.
However, if I had a steadying hand, and I usually do, I could have saved a lot of time on some of the rock pitching episodes by using a longer jack. I had to do it in two phases, and use a rock under the jack to get the second phase of rocks under the tire. So if you were able to safely mount a 60" jack, and the extra weight/size doesn't cause you an issue, I don't see any other issues with the longer jack, beyond a few extra $.
What I have intended to do, instead of getting a longer jack, is to rig up some sort of 'temporary limiting strap' that would keep the suspension from extending as I jack up a flat tire. I think this would eliminate a lot of the wobble and make it a little safer to swap out a flat tire.
HTH