<font color="blue"> so size is not the issue. </font>
Jinman,
Of course, you're right. Most brands put various hp engines in the same frame. So, size is a non-issue in those cases. Although, I imagine some 35hp tractors are smaller than their big brothers. Even if the sizes are way different, it's still a non-issue for a lot of folks. My comment was offered because for some jobs, in certain situations, bigger is not better.
I would like a larger tractor, but unfortunately, smaller works better for some of my essential tractor duties. Ah, well....if my wonderful wife would allow two, I'd be shoppin' for a big one.
OkieG