If you do decide to remove, here is an old thread showing a technique to both multiply your mechanical advantage to pull up the tree, as well as put yourself a reasonable distance from the falling tree.
http://www.tractorbynet.com/forums/build-yourself/129506-tree-puller-hard-get-trees.html
http://www.tractorbynet.com/forums/build-yourself/129506-tree-puller-hard-get-trees.html