if yer bow can handle modern string fiber, that's really the better way to go, imo - stronger, more durable, way less stretch/creep = less brace height fiddlin', allows experimenting with lower strand counts.
think of a bowstring as the bow's 'transmission'. it plays a critical role in transferring the limb's stored energy to the arra. all the modern hmpe string fibers (dyneema, vectran, etc.) are simply better at that job than lmpe fibers (dacron, etc).
dacron is absolutely not a bad choice for a bowstring fiber, but hmpe fiber is more efficient and durable = a better choice for me.