A PC is an electronic device, not an electromechanic one, IMHO. The more we can get rid of mechanical parts the better:
Less noise, less maintainance, less points of failure.
From what I understand when the game releases for $60 you will get what is the Aurora MR package now ($30). So you can pledge $30 now and wait for the game or wait for the game and buy it for $60.
If you pledge now and want to play with it now you have to get at least the Aurora MG+ package ($40) and the Arena Commander pass ($5). This $45 will get you access to the hangar with your ship now, the arena commander dog fighting module coming out soon (supposed to release the 28th but delayed) and access to the beta when that roles out. I think it does give you access to other modules as they are released as well (planet side and FPS). Just to make things more interesting you can purchase other ship packages to start out with instead of the Aurora MR. Remember if you do want to pledge for the full game now make sure you buy a ship package and not an individual ship; for example the Aurora MR+ package is $40 but the Aurora MR ship alone is $25. Top wrap it up you can also buy a ship package then add on individual ships or even buy multiple packages and have multiple characters you can play.