Nick, I did almost the same as you are but I started looking at the 33 to begin with as I already had a 1720 @ about 28 hp. I looked at the 33 and it was smaller than the 1720 and with just a little HP more was not worth spending for something new, so at only a few 100 more I went to the 35D, ordered one, and when the dealer told me it might take a few months, canceled the order and thought on it some more then ordered a 40D. Got it back in January and it has been a terrific piece of machine, buuuuuuuutttttt it is biiiiiigggggg. I have 30 acres and work quite a bit of it. If you only have 3, I'd strongly suggest the 33. My 1720 really was good enough for almost every job I ever did. ... and it did a good job of finish mowing. Since I got the 40D we also purchased a lawn tractor for mowing because the 40, in my mind is just to big for that task. Brush Hogging, plowing, pulling, planting, etc it's great, but finish mowing around a homestead, just too big. I know the small difference from the 33 to the 35 is really tempting, but big is not always better. Good luck in your decision.