Chipper/Shredder for Farm

 I have a 55 acre farm, part of which is timber.  I'm looking for a
reliable, sturdy, chipper/shredder that will rarely break down, and
handle limbs at least 3 in. to make mulch and compost for the garden.

I hear that belt driven is better than direct drive, and electric
starting is a good idea.  I do not want to attach to PTO, but I want to
be able to tow it behind my little RTV or truck around the farm to
where the work is.  If I could direct the output into the bed of my
truck would be a plus.

Which brands and models would you suggest?  I'm willing to pay the
price for a good machine that is reliable, rather than several machines
that break on me.

Also, do you know of any particular vendors where I could buy it
online, or who also have brick and mortar stores in Oregon?

Thanks,
Greg