I don't think anything you plan on will improve accuracy I would save the money and plan on a new barrel, A good shilen or cirterion from northland with the remage option will give you a much better shot at the accuracy improvement you seek. You can get tools you need to remove the current barrel and remount a new barrel yourself for about the $125 you have budgeted
However if that gun were mine I would consider leaving it alone and using it as is. Accuracy you describe seems adequate.
