Just my opinion, but the equipment is equally or more important than the tractor. You need to decide which implements you plan to use first. Not the type of implement, but specific brands. For instance, not all disc harrows are created equal. There are many on the market made of angle iron that weigh a few hundred pounds. Honestly, those aren't good for much except discing plowed ground. If you want a disc that will pulverize untilled ground, you need a heavy implement like a disc made by Brown Equipment Company.

Decide which implements you want to pull then get a tractor big enough to handle those. I will also add that my observation has been that there are quite a few small tractors on the used market and fewer big ones. That might be because fewer big ones are made. But it may also be because guys bought tractors that were too small for what they wanted to do. Too much tractor is not a problem. Too little tractor is a problem.

"When there was no fowl, we ate crawdad, when there was no crawdad, we ate sand."

"YOU ATE SAND!" - Raising Arizona