I agree that regular grovers should stay in tune pretty well - I have them on a lot of guitars. But if you are going to switch tuners, I would highly recommend the graphtech ratio tuners -- they are wonderful! There is a different gear ratio for each string, and it makes tuning a lot easier on some of the strings (like low E). Expensive, but worth it. They come with little metal templates that make them fit most guitars with drilling more holes. They are available in locking and non-locking versions.