How many listeners can I have?

[Xversion]

Hello,

I bought a server with the following specs:
->8GB RAM
->100GB HDD
->10,000GB Bandwidth (10TB)
->4 Cores @ 2Ghz Intel Xeon E5
->4000Mbps Connectivity

with AutoDJ

How many listeners can I have? with the maximum BitRate? and what is the maximum bitrate? can I not have it in Mbps instead of Kbps?

I wish to have 500 listeners (at minimum would these specs be enough or do I need to purchase more - I have another $700 in my pocket.)