Audio Streaming / Music Download

An interesting question recently came up during a discussion which I wasn't too sure of the answers / replies being discussed - perhaps some members may be kind enough to enlighten me on.

The question is: What would the preferred / best practice be for a website wanting to stream audio (say some sort of music they have created) be?

A) Stream it from their own dedicated server (any advantages / downsides)? (assuming bandwidth is unmetered @ 100Mbps)

B) Stream it through a streaming media provider (any advantages / downsides)?

C) Make it availalbe as a download as opposed to streaming it from their own server?

Now, the issue is that the content is commercial - i.e. users wanting to download / listen to it would need to pay a fee - i'm not sure if streaming providers would handle payment processing, etc?

Any finally, assume the delivery platform to be a LAMP environment.