[Blind-sysadmins] Best VNC Package?

Hi, Does anyone have a suggestion for a good VNC package to use that supports audio? There seem to be quite a few but the differences aren't really obvious just by reading about them. I need to be able to press things like control alt del to kill processes although if this isn't possible I can just do it via the command line instead. RDP is out of the question since it starts a new session when you remote in which isn't really what I want. Cheers for any pointers. Ben.