@Fa5t3r - I would try a wide range of different tones when recording and play them back to see what goes over the best and what projects the image you want people to hear. Remember that some people may be going to hear this message over and over again depending on how often they have to call you so you want it to be very pleasant and not at all irritating.
You can play a voice message at different speeds and pause/resume the message, using desktop client visual voicemail, or by dialing into their voicemail. Pressing a certain key on your phone controls how you can hear the voicemail:

Many of our users don’t need calls routed to their phone, they just want a good virtual voicemail system. We can do that, too. Just set up your VirtualPBX account with multiple voicemail boxes for each user or purpose you need. Furthermore, we can route calls directly to voicemail, without ringing a phone first.
Obviously, I need to update it. And if you haven't changed your voicemail greeting in over a year, you're likely in the same boat.