Currently we have a freightliner with a Galbreath. I am very partial to Galbreath and really like them because of the smplicity of them. They do not have alot of excess moving parts and they are pretty much bullet proof as long as you grease them and change the oil once a year. Only tip I have, would be to spend the extra money and get a higher capacity hoist then you think you need, you will thank yourself in the long run.
As far as chassis go we have had a few, I think it is all personal preference. Stick with one of the big names and as long as you do your research you will be fine. Our Freightliner is up to be replaced next year. I will most likely go with a KW this time around.