Benefits to running a MSD type ignition

So, Im planning on future upgrades to my car. I see a lot of people that run MSD boxes and Im wondering what the pro's or perhaps con's might be. If I were to add one of these boxes I would also want to swap in the distributor and upgrade the wiring and coil.

My car is currently a 360 with stock electronic ignition. Is there any gain to upgrading to a Blaster 2 coil and larger pug wires now?