Hi Tcarter,
For what you want to do and the size of trees, a stump bucket should work just fine. My stump bucket is made by Markham Welding, (not too far up the road from where you live). These buckets are also good for transplanting bushes, and I have even used it to dig some footers...just put it down at an angle, and drive forward and push the dirt out of the way.
I have discovered that large pines especially have longggg tap roots. A track hoe is best for those. Broadleaf trees are not so bad since the roots spread out more. You just go around it and cut some lateral roots on one side with the stump bucket, first. Then, dig in a little on that side, pushing forward and using the bucket as a fulcrum. The weight of the tree leaning will help you to bring it out. Fun stuff...never had access to the really fun stuff, dynamite...ohhh well.
I think a stump bucket is a good addition, (and fairly inexpensive), to your arsenal of versatile tractor weapons. If you do get one make sure it has dentures, since they really help it dig.