I agree that the high jack point on a big truck needs careful consideration. However, in some cases it's just about impossible to get a bottle jack under a stuck truck axle. In that case, if the axle is chained to the frame, and the frame (which will be closer to the ground if the truck has sunk!) lifted with the Highlift, the axle will be extracted, as for adding ballast under the tire. There's also an adapter to allow a Highlift to connect to a wheel to jack up an axle from the end. IMHO, the Highlift is still an invaluable tool, especially if you include some chains and hooks for using the Highlift as a come-along.
The 60" long beam jack is the one to have. Consider, however, that beam bending is the problem on tall lifts. This is exacerbated by the base of the jack, especially on the huge aftermarket bases, when not perfectly supported will assist bending the beam by creating a lever at the bottom! Best to take off the base and support with a heavy board that lets the base of the beam seek a little angle to the base (the beam does not bend that way).