I till and plow with my son's 1650 and it's a beast!
Some video's for you to judge for yourself.
Mu buddy Andy is plowing for the first time. There was brush there and we had to plow thru the roots.
http://www.youtube.com/watch?v=yum0QEBpTrs
Another Andy video!
http://www.youtube.com/watch?v=8P_E8W6y5JI
The tiller being used to break up some of the red clay balls.
http://www.youtube.com/watch?v=s7udUj1tM9k