I have a Hawkline 6' HD 3pt 80 hp hog that's 2 yrs. old. It's great. I've chopped down 3" hardwood saplings with it no problem. I did run into blade issues with it. I broke a blade and purchased a set of BushHog blades not knowing the bend was different.
I chopped off the gearbox nut and shaft and had to replace the gearbox short of rebuilding my existing gearbox with a new shaft.
The gearbox was only +/-$250.00 shipped to the door. Not bad considering what you got. The whole ordeal was due to my own fault, not sizing up the blades.
I would have to say I think they are the better hogs on the market price and construction vs the others as far as I've seen.
I'll be buying an 8' 3pt unit in the spring to go along with a 75 hp tractor upgrade.
Another tidbit to consider... the Hawkline hogs are square backed. So if you have bigger stuff to mow, your better off to back over the trees, shurbs etc. to keep your tractor from taking all the abuse going foreward over everything. The higher end brush hogs such as the Bush Hogs have a rounded back. The rounded back hogs backing over heavier objects tend to bend the back of the hog under where the blade will strike the sheet metal causing problems. Been there, done that. Stick with a square backed hog!