Good blades can make a big difference on a saw, but you don't need to spend a fortune for top notch performance. Separate task specific blades ensure best performance for every task.
Forrest makes some great blades, but are among the most expensive options with nearly every example of a comparable grind type and tooth count. Infinity are some of the very best blades I've used, and I highly recommend them for hobby use. Ridge Carbide, Tenryu Gold Medal, Freud Industrial, Amana Tool, and CMT Industrial also makes some excellent blades.