Recomendations for RMS

I've read somewhere on this forum that using Audio / Video chat uses around 1mbit per user.. My server is on a 100mbit line, so Im thinking that If I have 100+ users at the same time using the Audio / Video chat, it's going to kill my BW.

IF this is true, I wanted to ask what you people would suggest when it comes to renting an RMS..

http://www2.speedyshare.com/files/20345690/download/RMS.JPG

I've taken a screenshot to make it easier. This is from a site I found called "gigapros.com".

Would I need the PRiVATE or SHARED? According to the info provided there, there are no limits.

If you have any suggestions about other companies please let me know.

bump

Someone told me Joombytes has a 5 buck a month deal - but I don't know how the bandwidth issue is settled.  It seems that it would only be "unlimited" until the host told you it was limited.

Gigapros says their is unlimited..

However, is it enough for me to run on the Shared or?