Well, I would have replied Bucket Truck hands down until I read Deevo's post. That indeed is a special circumstance. Boating it in and out...Wow, I would not want to pay the bill to have that tree trimmed.
I have a 60' ford with a chip box and love it. You ask about speed. It will go so fast that it will throw you right out of the bucket if you want it to. At first getting used to the controls you will go slow, trust me. As you figure them out you can adjust the idol and speed it up a bit. I set my idol about 1000 rpm and that is plenty fast, especially 60' hi. I like the fact that I can load up everything I need in the boxes, hook up the chipper and throw a guy in the passenger side and go to the site. Only feeding one truck that way. I started out with a utility truck with no chip box and had to drive another pickup with a dump trailer everywhere. First year I switched my fuel bill dropped considerable. Now the only time I take two trucks is if I need the loader. Make sure that you get something tall enough. I started out with a 45' boom and I am surprised I didn't kill myself. We were always doing so crazy rigging. Now I hardly ever have to rig anything. That extra 10' /15' is a huge difference.