I have the 60" finish mower, but have not used it yet. I am itching to get the grass growing and test it out. It is rear discharge. You cannot get a bagger for it, so be forewarned( I never bag anyway).
The 54" lift height is an issue if you have to load a pickup truck from the side. It cannot be done without a ramp of some sorts. So be aware of that as well. However, I rarely load a truck from the side. I do load a low trailer and that works fine. I can make dirt piles about 4' high no problem.
I am 6' tall with size 13 shoes and long legs. I have spent several one hour stretches on it with no discomfort at all. The reason that I have not spent longer stretches of time on it are that I get the jobs done so quickly. Really! No kidding! One day I spent a total of 4 hours on it moving lots of dirt and sod, but I was never on it for more than an hour and 10 minutes or so. I jsut kept finding things to do with it and getting them done.
Getting in and out is not too bad. There is a hump that you have to step over. And you will bump your head on the canopy once(twice if your a slow learner like me).
The ride is not too bumpy at all. No bumpier than any other machine that I have operated. The really nice feature is that it twists in the middle, so on uneven ground all 4 wheels stay on the ground. It is very high to get one wheel off of the ground.
My mowing experience is limitted to several hours on the 48" brush hog. I mowed quite a bit of very heavy brush in a very short time. I think it was three passes over a mile of trail. Cut some 1.5 inch saplings with ease.
And I have pulled a rubbermiad cart full of firewood, probably over 500 pounds, with ease. When I get my trailer hitch attachment welded up, I'll tow some heavier items.
You should probably read this entire thread( get several cups of coffee ). Many folks have asked the same questions as you and several owners have contributed LOTS of valuable information about the Power Trac 400 series.
If you have any other questions, feel free to jump in and ask.