In real world terms I don't know if your see a noticable difference in accuracy between a laminate stock, a sythnthetic stock or even a properly sealed wood stock. The laminate must be bedded ith bedding compound for best accuracy. What most people don't know is you should also bed the alluminum bedded stocks too if you want ultimate accuracy, there will always be stress on the action if you don't.
The main difference between laminate and the better synthetics is laminate is heavier and in my opinion looks much better, a laminite stock will be take a little bit more work to properly fit. A good synthetick stock is lighter (important if your carring it alot), in my opinion not near as attractive as wood or laminate and if it has a bedding block it just needs a skim coat of bedding compound. The factory poly stocks are pure garbage for precision shooting but fine for a hunting rig. It really comes down to what stock fits you best, feels best to you in your hands and pleases your eye.