[Serusers] rtp proxy recommendations?

[Andy Pyles]

Hi, I'd like to get some recommendations from other users what the best 
option for an rtp proxy to use. From what I have seen the options are:

1.)  Ser MEDIA proxy

2.)  rtpproxy

3.)  asterisk ( perhaps with some slight modifications )

What are people using? and any insight would be helpful, as to which 
model seems to work the best.

regards,
Andy