There's no easy answer to this question. Your bow stabilizer should be as long and heavy as you need it to be to help your bow perform the way you want it to. Generally, the heavier a stabilizer, the more noise and vibration it will absorb. That said, if you have an inherently quiet and dead-in-the-hand bow and you want its overall weight to be as light as possible, you might go with a small, light model or even no stabilizer. If your main goal is ultimate accuracy and you don't mind toting some extra weight, you should get a front and back bar with adjustable weights and add just enough to perfectly balance the bow, so that when you draw and anchor with your eyes closed and then open them, the sight bubble is perfect.