Altec for ease of use and smooth boom operation.
Terex for fast boom speed, furthest rear mounted elevator unit, and open deck space.
Versalift 75' FTW!
let me eleaborate.......
Altec are beautiful smooth trucks, and very well built. They are set in FRONT of the rear axle and have a long rear deck behind the axle meaning you lose 6'-8' of setup off the rear. They also mount their elevators parallel so you lose ALL deck space for storage of wood and mats, etc. Shite design, IMO!
Terex booms move super fast. They are also very "bouncy", you get a lot of movement out of them while maneuvering through the air/tree. Especially in the elevators and lowest knuckle on the turret. They mount their units BEHIND the rear axle, giving the most reach possible when working from the rear. They also transversely mount their units giving you the most usable deck space possible for mats, tools, wood, etc.
Versalift has always made a SUPER smooth, strong, dependable unit. Their new elevator units have a slick pistol grip setup, mount transversely, and seem really nice. I have yet to fly one and these are only observations.
My ultimate choice would be a modified Altec rear mount for deck space. If you're not into that cost get the Terex.