Bandsaw would be worth getting. I have a Record 350 and its saved hours when resawing or ripping. With blades get the best quality and tension properly. If it wanders then its not equally sharp or set on both sides. All the guides do is set the route of the blade through the machine not the cut.
Try continental style setting pliers. They are fully adjustable for amount of set and tooth size. I used some to set a ripsaw I made from an old hardpoint saw. Got just enough set to let the plate pass through the kerf, a great aid to straight cuts.