Maybe what you should do.........is, just sell the blaster ( they are good beginner quads, they sell quickly when priced appropriately ). Then take youre fist full of cash and go put a YFZ frontend on your Banshee, now that is "IF" all that you said is wrong with it.
Then take the remainder and put it in to other mods or whatever. Just because the frontend bushings, and balljoints might be a lil worn & wiggly doesn't mean it's a piece of shit unless there is more wrong then what you are leading to believe.
Just ride it the way it is right now, sell the the blaster, and make a winter project out of the Banshee you already own and post updates. No matter what you buy there's always going to be something you want to change about it.