Just wanted to update this thread for my own notes. Maybe it will be helpful to someone else as well. The BROWN 472 is now at the top of my list for a cutter to look out for.
Brown 472 Rotary Cutter with 72" Cut | 130 HP Gear Box | Single Tail Wheel | Brown Manufacturing | 800-633-8909

Too bad my tractor can't handle the 672! That thing is a BEAST!